Fixed duplicated key issue #4

	name: Deploy mkdocs
	on:
	push:
	branches:
	- master
	permissions:
	contents: write
	jobs:
	deploy:
	name: 'Deploy mkdocs'
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Configure Git Credentials
	run: \|
	git config user.name github-actions[bot]
	git config user.email 41898282+github-actions[bot]@users.noreply.github.com
	- uses: actions/setup-python@v4
	with:
	python-version: 3.x
	- run: echo "cache_id=$(date --utc '+%V')" >> $GITHUB_ENV
	- uses: actions/cache@v3
	with:
	key: mkdocs-material-${{ env.cache_id }}
	path: .cache
	restore-keys: \|
	mkdocs-material-
	- run: pip install mkdocs-material
	- name: Mirror GitHub md's
	run: \|
	cp -f CONTRIBUTING.md docs/contributing/CONTRIBUTING.md
	cp -f CODE_OF_CONDUCT.md docs/contributing/CODE_OF_CONDUCT.md
	cp -f LICENSE.md docs/about/LICENSE.md
	cp -f SUPPORT.md docs/SUPPORT.md
	- run: mkdocs gh-deploy --force

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