Don't attempt to register overloads that aren't for this target in `BaseContext` and related fixes #1321


	name: Check Release Notes
	on:
	pull_request: {}

	env:
	GITHUB_PR_NUMBER: ${{github.event.pull_request.number}}

	jobs:
	check:
	name: Check release notes
	if: ${{ !contains(github.event.pull_request.labels.*.name, 'skip_release_notes') }}
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0
	- name: Set up Python 3.9
	uses: actions/setup-python@v4
	with:
	python-version: 3.9
	- name: Install towncrier
	run: \|
	python3 -m pip install towncrier==23.6 "importlib_resources<6" rstcheck
	- name: Run towncrier
	run: \|
	git fetch --no-tags origin +refs/heads/${BASE_BRANCH}:refs/remotes/origin/${BASE_BRANCH}
	towncrier check --compare-with remotes/origin/${BASE_BRANCH}
	python maint/towncrier_rst_validator.py --pull_request_id $GITHUB_PR_NUMBER
	env:
	BASE_BRANCH: ${{ github.base_ref }}

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