Show clippy warning names in GH UI

[jjant]

Motivation

I'm just integrating CI with actions-rs on my project and I got a couple of clippy warnings, these show up in the GH UI properly:

But it'd be nice to have the warning name (clippy::too-many-arguments) in the GH pop-up thingy to easily disable them if I needed too.

Workflow example

I pretty much copied the Matrix example: https://github.com/jjant/runty8/pull/27/files#diff-73e17259d77e5fbef83b2bdbbe4dc40a912f807472287f7f45b77e0cbf78792d