update source link to release (#377)

Author: tg123

src/KubernetesClient/KubernetesClient.csproj

@@ -37,7 +37,7 @@
     <PackageReference Include="Newtonsoft.Json" Version="9.0.1" Condition="'$(TargetFramework)' != 'netstandard2.0' and '$(TargetFramework)' != 'netcoreapp2.1'" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.2" Condition="'$(TargetFramework)' == 'netstandard2.0' or '$(TargetFramework)' == 'netcoreapp2.1'" />
     <PackageReference Include="YamlDotNet" Version="6.0.0" />
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-18618-05" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetFramework)' == 'net452'">
     <Reference Include="System.Net.Http.WebRequest" />