add repository mirrors to README

Dependencies

• [2] WQOLDV5Z initial commit: README.md

Change contents

• edit in README.md at line 10
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  + Consistent with the topic of the workshop, this repository is mirrored in several places, with the primary repository currently being the one hosted on Codeberg:

  +

  + - [Codeberg: jezcope/git-wo-github](https://codeberg.org/jezcope/git-wo-github) **Primary**

  + - [sr.ht: ~petrichor/git-wo-github](https://sr.ht/~petrichor/git-wo-github/)

  + - [GitHub: jezcope/git-wo-github](https://github.com/jezcope/git-wo-github)