Bump Microsoft.SourceLink.GitHub from 1.1.1 to 8.0.0 in /src (#160)

Bumps [Microsoft.SourceLink.GitHub](https://github.com/dotnet/sourcelink) from 1.1.1 to 8.0.0.
- [Release notes](https://github.com/dotnet/sourcelink/releases)
- [Commits](https://github.com/dotnet/sourcelink/commits)

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

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

Author: dependabot[bot]

src/EmptyFiles.Tool/EmptyFiles.Tool.csproj

@@ -14,7 +14,7 @@
   <ItemGroup>
     <ProjectReference Include="..\EmptyFiles\EmptyFiles.csproj" PrivateAssets="None" />
     <PackageReference Include="ProjectDefaults" Version="1.0.101" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
     <None Include="$(ProjectDir)..\..\files\**\empty.*">
       <Pack>true</Pack>
       <PackagePath>tools\net8.0\any\EmptyFiles</PackagePath>

src/EmptyFiles/EmptyFiles.csproj

@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="System.Memory" Version="4.5.5" Condition="'$(TargetFrameworkIdentifier)' == '.NETStandard' OR '$(TargetFrameworkIdentifier)' == '.NETFramework'" />
     <PackageReference Include="ProjectDefaults" Version="1.0.101" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" Condition="$(Configuration) == 'Release'" />
     <PackageReference Include="Polyfill" Version="1.32.1" PrivateAssets="all" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" Condition="$(TargetFramework) =='net461'" />
     <None Include="..\EmptyFiles.targets" Pack="True" PackagePath="build\EmptyFiles.targets" CopyToOutputDirectory="PreserveNewest" />