[Instrumentation.WCF] Release 1.0.0-rc.8 (#858)

Author: Kielek

src/OpenTelemetry.Instrumentation.Wcf/CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.0.0-rc.8
+
+Released 2022-Dec-28
+
 * Update OTel SDK version to `1.3.1`.
   ([#631](https://github.com/open-telemetry/opentelemetry-dotnet-contrib/pull/631))
 * Change value `rpc.system` from `wcf` to `dotnet_wcf`.