(GH-70) Add AvoidSemiColonsAsLineTerminators

[michaeltlombardi]

PR Summary

This change adds the new AvoidSemiColonsAsLineTerminators rule
documentation to PSScriptAnalyzer.

• Resolves Document new PSSA Rule "AvoidSemiColonsAsLineTerminators" #70
• Fixes AB#4588

PR Checklist

• Descriptive Title: This PR's title is a synopsis of the changes it proposes.
• Summary: This PR's summary describes the scope and intent of the change.
• Contributor's Guide: I have read the contributors guide.
• Style: This PR adheres to the style guide.

[opbld31]

Docs Build status updates of commit 0507ff2:

✅ Validation status: passed

File	Status	Preview URL	Details
reference/docs-conceptual/PSScriptAnalyzer/Rules/AvoidSemicolonsAsLineTerminators.md	✅Succeeded	View (ps-modules)
reference/docs-conceptual/PSScriptAnalyzer/Rules/README.md	✅Succeeded	View (ps-modules)
reference/docs-conceptual/toc.yml	✅Succeeded	View (ps-modules)

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