update(userspace/engine): improve skip-if-unknown-filter YAML field #38

	# NOTE: it is UNSAFE to run ANY kind of script when using the pull_request_target trigger!
	# DO NOT TOUCH THIS FILE UNLESS THE TRIGGER IS CHANGED.
	# See warning in https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#pull_request_target.

	name: Engine version checks (weak)
	on:
	pull_request_target:
	paths:
	- 'userspace/engine/*.cpp'
	- 'userspace/engine/*.h'

	jobs:
	paths-filter:
	runs-on: ubuntu-latest
	outputs:
	engine_version_changed: ${{ steps.filter.outputs.engine_version }}
	steps:
	- uses: actions/checkout@v2
	- uses: dorny/paths-filter@v2
	id: filter
	with:
	filters: \|
	engine_version:
	- 'userspace/engine/falco_engine_version.h'

	check-engine-version-weak:
	runs-on: ubuntu-22.04
	permissions:
	pull-requests: write
	needs: paths-filter
	if: needs.paths-filter.outputs.engine_version_changed == 'false'
	steps:
	- name: Check driver Falco engine version
	uses: mshick/add-pr-comment@v2
	with:
	message: \|
	This PR may bring feature or behavior changes in the Falco engine and may require the engine version to be bumped.

	Please double check userspace/engine/falco_engine_version.h file. See [versioning for FALCO_ENGINE_VERSION](https://github.com/falcosecurity/falco/blob/master/RELEASE.md#falco-repo-this-repo).

	/hold

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