docs: Improve clarity on `--cache`. #63462

	name: Cleanup branch caches
	on:
	pull_request:
	types: [opened, closed, reopened, synchronize]
	push:
	workflow_dispatch:
	workflow_call:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	permissions:
	actions: write

	jobs:
	cleanup:
	runs-on: ubuntu-latest
	if: ${{ github.ref != 'refs/heads/main' }}
	steps:
	- name: Cleanup
	env:
	GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	gh extension install actions/gh-actions-cache

	REPO=${{ github.repository }}
	BRANCH=${{ github.ref }}

	echo "Fetching list of cache key"
	cacheKeysForPR=$(gh actions-cache list -R "$REPO" -B "$BRANCH" --limit 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"

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