Add missing repository information to package

Author: kzu

src/System.Diagnostics.Tracer/System.Diagnostics.Tracer.csproj

@@ -16,6 +16,10 @@
 
   <ItemGroup>
     <PackageReference Include="IFluentInterface" Version="2.1.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
     <PackageReference Include="NuGetizer" Version="0.9.1" />
   </ItemGroup>