Update mebuild.sourcelink.github package

liobgit2 was failing to find libcurl on linux with the older package,
newer packages must have fixed the assembly loading/versions somehow

Author: seif

src/Directory.Build.props

@@ -37,7 +37,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta-63127-02" PrivateAssets="All"/>
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-19367-01" PrivateAssets="All"/>
     <PackageReference Include="Microsoft.NetFramework.ReferenceAssemblies" Version="1.0.0-preview.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>