Update Microsoft.SourceLink.GitHub to 1.0.0-beta2-18618-05

Author: bording

LibGit2Sharp/LibGit2Sharp.csproj

@@ -28,7 +28,7 @@
 
   <ItemGroup>
     <PackageReference Include="LibGit2Sharp.NativeBinaries" Version="[2.0.278]" PrivateAssets="none" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-63127-02" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05" PrivateAssets="all" />
     <PackageReference Include="Nerdbank.GitVersioning" Version="2.2.13" PrivateAssets="all" />
   </ItemGroup>