Update dependency Microsoft.SourceLink.GitHub to 10.0.103

Author: renovate[bot]

src/Directory.Build.props

@@ -31,7 +31,7 @@
 
   <!-- Build-time dependencies -->
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.102" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="10.0.103" PrivateAssets="All" />
   </ItemGroup>
 
   <!-- Global usings -->