Fix docs widget on googleapis.dev
Fix docs widget on googleapis.dev

Not sure how long this has been broken for... the GitHub URL in googleapis.dev contains a double https://github.com/

googleapis/google-cloud-dotnet,jskeet/google-cloud-dotnet,jskeet/google-cloud-dotnet,googleapis/google-cloud-dotnet,jskeet/google-cloud-dotnet,jskeet/google-cloud-dotnet,jskeet/google-cloud-dotnet,googleapis/google-cloud-dotnet,jskeet/gcloud-dotnet