Wrong github actions release-please usage links

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#### Environment details

- Programming language: na
- OS: na
- Language runtime version: na
- Package version:

#### Steps to reproduce

1. goto https://github.com/googleapis/release-please-action
2. documentation is still pointing to the old and archived repository which is not working anymore. same in github actions marketplace

Making sure to follow these steps will guarantee the quickest resolution possible.

Thanks!