Fix labeler configuration for v5

[wendigo]

https://github.com/marketplace/actions/labeler#breaking-changes-in-v5

It failed on one of my PRs:

Run actions/labeler@v5
The configuration file (path: .github/config/labeler-config.yml) was not found locally, fetching via the api
Error: Error: found unexpected type for label 'tests:hive' (should be array of config options)
Error: found unexpected type for label 'tests:hive' (should be array of config options)

[wendigo]

I hope that it works. Hard to test without merging as the configuration is taken from base branch.

[findepi]

thanks for fixing this

what was wrong with the previous more readable yaml list items one-per-line syntax?

[wendigo]

It isn't longer supported by the v5 plugin updated by @ebyhr

[findepi]

so the labeler yml file does not use follow yaml syntax?

[wendigo]

I've followed a syntax from readme. I guess that more yaml-ish would work too (wrapping array elements on newlines)