add: docs/postgraduate/tongji/240312-1.md (#42) #76

	name: Deploy to Github Pages
	on:
	push:
	branches:
	- main
	jobs:
	deploy:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	with:
	python-version: 3.x
	- uses: actions/cache@v2
	with:
	key: ${{ github.ref }}
	path: .cache
	- run: pip install mkdocs-material
	- run: mkdocs gh-deploy --force

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