link to contributing docs is broken #1269
Description
the file referred by the CONTRIBUTING.md points to a non-existing page it should most likely be pointing to https://tianshou.org/en/stable/04_contributing/04_contributing.html
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the file referred by the CONTRIBUTING.md points to a non-existing page it should most likely be pointing to https://tianshou.org/en/stable/04_contributing/04_contributing.html