chore: lock CI to use ubuntu 22.04 #2635

	# This workflow cleans up any cache entries associated with a pull request once it has been closed.
	# This prevents us from having many refs/pull/PR_NUMBER/merge cache entries which will never be used.
	#
	# Note that this will affect both PRs being closed with and without being merged.

	name: Cleanup closed PR cache entries

	on:
	pull_request:
	types:
	- closed

	jobs:
	cleanup:
	runs-on: ubuntu-22.04
	steps:
	- name: Cleanup
	run: \|
	gh extension install actions/gh-actions-cache

	echo "Fetching list of cache key"
	cacheKeysForPR=$(gh actions-cache list -R $REPO -B $BRANCH -L 100 \| cut -f 1 )

	## Setting this to not fail the workflow while deleting cache keys.
	set +e
	echo "Deleting caches..."
	for cacheKey in $cacheKeysForPR
	do
	gh actions-cache delete $cacheKey -R $REPO -B $BRANCH --confirm
	done
	echo "Done"
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	REPO: ${{ github.repository }}
	BRANCH: refs/pull/${{ github.event.pull_request.number }}/merge

Provide feedback