Fix docs to resolve "Unable to find a method called PostgreSql"

[gambitier]

I followed the docs https://github.com/serilog-contrib/Serilog.Sinks.Postgresql.Alternative/blob/master/HowToUse.md#configuration-via-json-file-to-use-named-connection-strings

But got following exception

2021-12-10T07:20:53.8241650Z Unable to find a method called PostgreSql. Candidate methods are:
Serilog.LoggerConfiguration Providers(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Extensions.Logging.LoggerProviderCollection, Serilog.Events.LogEventLevel, Serilog.Core.LoggingLevelSwitch)
Serilog.LoggerConfiguration Console(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, Serilog.Core.LoggingLevelSwitch, System.Nullable`1[Serilog.Events.LogEventLevel], Serilog.Sinks.SystemConsole.Themes.ConsoleTheme)
Serilog.LoggerConfiguration Console(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Formatting.ITextFormatter, Serilog.Events.LogEventLevel, Serilog.Core.LoggingLevelSwitch, System.Nullable`1[Serilog.Events.LogEventLevel])
Serilog.LoggerConfiguration Debug(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, Serilog.Core.LoggingLevelSwitch)
Serilog.LoggerConfiguration Debug(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Formatting.ITextFormatter, Serilog.Events.LogEventLevel, Serilog.Core.LoggingLevelSwitch)
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, System.String, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan])
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Formatting.ITextFormatter, System.String, Serilog.Events.LogEventLevel, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan])
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, System.String, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan], Serilog.RollingInterval, Boolean, System.Nullable`1[System.Int32], System.Text.Encoding)
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Formatting.ITextFormatter, System.String, Serilog.Events.LogEventLevel, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan], Serilog.RollingInterval, Boolean, System.Nullable`1[System.Int32], System.Text.Encoding)
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, System.String, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan], Serilog.RollingInterval, Boolean, System.Nullable`1[System.Int32], System.Text.Encoding, Serilog.Sinks.File.FileLifecycleHooks)
Serilog.LoggerConfiguration File(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Formatting.ITextFormatter, System.String, Serilog.Events.LogEventLevel, System.Nullable`1[System.Int64], Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1[System.TimeSpan], Serilog.RollingInterval, Boolean, System.Nullable`1[System.Int32], System.Text.Encoding, Serilog.Sinks.File.FileLifecycleHooks)
Serilog.LoggerConfiguration PostgreSQL(Serilog.Configuration.LoggerSinkConfiguration, System.String, System.String, System.Collections.Generic.IDictionary`2[System.String,Serilog.Sinks.PostgreSQL.ColumnWriters.ColumnWriterBase], Serilog.Events.LogEventLevel, System.Nullable`1[System.TimeSpan], System.IFormatProvider, Int32, Int32, Serilog.Core.LoggingLevelSwitch, Boolean, System.String, Boolean, Boolean, System.Action`1[System.Exception], Microsoft.Extensions.Configuration.IConfiguration)
Serilog.LoggerConfiguration PostgreSQL(Serilog.Configuration.LoggerSinkConfiguration, System.String, System.String, System.Collections.Generic.IDictionary`2[System.String,System.String], System.Collections.Generic.IDictionary`2[System.String,Serilog.Sinks.PostgreSQL.ColumnWriters.SinglePropertyColumnWriter], Serilog.Events.LogEventLevel, System.Nullable`1[System.TimeSpan], System.IFormatProvider, Int32, Int32, Serilog.Core.LoggingLevelSwitch, Boolean, System.String, Boolean, Boolean, System.Action`1[System.Exception], Microsoft.Extensions.Configuration.IConfiguration)
Serilog.LoggerConfiguration Sink(Serilog.Configuration.LoggerSinkConfiguration, Serilog.Core.ILogEventSink, Serilog.Events.LogEventLevel, Serilog.Core.LoggingLevelSwitch)
Serilog.LoggerConfiguration Logger(Serilog.Configuration.LoggerSinkConfiguration, System.Action`1[Serilog.LoggerConfiguration], Serilog.Events.LogEventLevel, Serilog.Core.LoggingLevelSwitch)
[12:50:53 INF] Starting the server...

Then I tried one of the solution suggested here, and it worked for me

"Name": "PostgreSQL",

method with all-capital SQL

#11 (comment)

[SeppPenner]

Yep, the docs are wrong. Thank you for the hint, I will update them soon. Using PostgreSQL is correct.

[SeppPenner]

@all-contributors please add @gambitier for doc

[allcontributors]

@SeppPenner

I've put up a pull request to add @gambitier! 🎉