⬆️ Update 🥅 .NET Package Microsoft.SourceLink.GitHub to v8 (#109)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [Microsoft.SourceLink.GitHub](https://togithub.com/dotnet/sourcelink)
| `1.1.1` -> `8.0.0` |
[![age](https://developer.mend.io/api/mc/badges/age/nuget/Microsoft.SourceLink.GitHub/8.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/nuget/Microsoft.SourceLink.GitHub/8.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/nuget/Microsoft.SourceLink.GitHub/1.1.1/8.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/nuget/Microsoft.SourceLink.GitHub/1.1.1/8.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

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Directory.Packages.props

@@ -6,7 +6,7 @@
     <PackageVersion Include="Microsoft.PowerShell.SDK" Version="7.2.16" Pin="true"/>
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.8.0" developmentDependency="true" />
     <PackageVersion Include="GitHubActionsTestLogger" Version="2.3.3" developmentDependency="true" />
-    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="1.1.1" developmentDependency="true" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" developmentDependency="true" />
     <PackageVersion Include="codecov.msbuild" Version="1.13.0" developmentDependency="true" />
     <PackageVersion Include="coverlet.collector" Version="6.0.0" developmentDependency="true" />
     <PackageVersion Include="coverlet.msbuild" Version="6.0.0" developmentDependency="true" />