Minor bug fix for `tests.WarningChecker` when IERS is down #1190

	name: Warning Tests

	on:
	push:
	# This should disable running the workflow on tags, according to the
	# on.<push\|pull_request>.<branches\|tags> GitHub Actions docs.
	branches:
	- "*"
	pull_request:

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	warning_test:
	env:
	PYTHON: 3.11
	name: Warning Test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@main
	with:
	fetch-depth: 0

	- name: Setup Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ env.PYTHON }}

	- name: Install
	run: \|
	CFLAGS="-DCYTHON_TRACE=1 -DCYTHON_TRACE_NOGIL=1" pip install -e .[dev]

	- name: Environment Info
	run: \|
	pip list
	PYVER=`python -c "import sys; print('{:d}.{:d}'.format(sys.version_info.major, sys.version_info.minor))"`
	if [[ $PYVER != ${{ env.PYTHON }} ]]; then
	exit 1;
	fi

	- name: Run Tests
	run: \|
	pytest -W error --pyargs pyuvdata --cov=pyuvdata --cov-config=.coveragerc --cov-report xml:coverage.xml

	- uses: codecov/codecov-action@v3
	if: success()
	with:
	token: ${{secrets.CODECOV_TOKEN}} #required
	file: ./coverage.xml #optional

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