Bump Microsoft.SourceLink.GitHub from 1.0.0 to 8.0.0

Bumps [Microsoft.SourceLink.GitHub](https://github.com/dotnet/sourcelink) from 1.0.0 to 8.0.0.
- [Release notes](https://github.com/dotnet/sourcelink/releases)
- [Commits](dotnet/sourcelink@1.0.0...8.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.SourceLink.GitHub
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Akismet.Net/Akismet.Net.csproj

@@ -28,7 +28,7 @@
 	<PackageReference Condition="'$(TargetFramework)' == 'netstandard2.0'" Include="Microsoft.CSharp">
 		<Version>4.7.0</Version>
 	</PackageReference>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0">
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>