[clang-tools-extra] [clang-doc] add return comments to comment template (PR #150647)

[Erick Velez via cfe-commits]

evelez7 wrote:

The CI was green before I started a stack merge via Graphite. Now it's stuck in this terrible loop so I'm going to bypass the rule and force it to merge.

@boomanaiden154 Not sure if you know anything about this but maybe you can point me to someone who does. I think the newly required CI rules don't play nice with Graphite auto-merging. Graphites constantly rebases the branch when trying to merge, which will cause CI to trigger again.

https://github.com/llvm/llvm-project/pull/150647