THIS IS A TEST INSTANCE ONLY! REPOSITORIES CAN BE DELETED AT ANY TIME!

Add a quick start runner method in README (#282)

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/282
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-committed-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit was merged in pull request #282.
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Gitea Version: 1.28.0+dev-528-ga5a645824f