ci(codecov): update codecov default branch #5514

	---
	# This action is centrally managed in https://github.com/<organization>/.github/
	# Don't make changes to this file in this repo as they will be overwritten with changes made to the same file in
	# the above-mentioned repo.

	# Lint python files with flake8.

	name: flake8

	on:
	pull_request:
	branches: [master, nightly]
	types: [opened, synchronize, reopened]

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

	jobs:
	flake8:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5 # https://github.com/actions/setup-python
	with:
	python-version: '3.10'

	- name: Install dependencies
	run: \|
	# pin flake8 before v6.0.0 due to removal of support for type comments (required for Python 2.7 type hints)
	python -m pip install --upgrade pip setuptools "flake8<6"

	- name: Test with flake8
	run: \|
	python -m flake8 --verbose

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