Make sure we have local tags before updating release notes
Make sure we have local tags before updating release notes

Without this, the release note updater may not find the latest version as a tag, but will see it in the release notes, and then insert all the older tag versions.

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