Bump Microsoft.SourceLink.GitHub from 1.0.0 to 1.1.1 (#467)

Bumps [Microsoft.SourceLink.GitHub](https://github.com/dotnet/sourcelink) from 1.0.0 to 1.1.1.
- [Release notes](https://github.com/dotnet/sourcelink/releases)
- [Commits](dotnet/sourcelink@1.0.0...1.1.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Packages.props

@@ -2,7 +2,7 @@
 <Project>
   <ItemGroup>
     <GlobalPackageReference Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.2" />
-    <GlobalPackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" />
+    <GlobalPackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" />
     <GlobalPackageReference Include="Rocket.Surgery.MSBuild.CI" Version="1.1.0" />
     <GlobalPackageReference Include="Rocket.Surgery.MSBuild.GitVersion" Version="1.1.0" />
     <GlobalPackageReference Include="Rocket.Surgery.MSBuild.JetBrains.Annotations" Version="1.1.0" Condition="'$(MSBuildProjectName)'!='.build'" />