message: Use the /contribute URL for the Good First Issues link
  GitHub proposes a `<repo>/contribute` URL as a page to get people into contributing, which declutters the usual issues page a bit.
  Issuing this PR as a suggestion, feel free to close it.
  Example:
diff: @@ -95,7 +95,7 @@ We would love your help in building Backstage! See [CONTRIBUTING](CONTRIBUTING.m
  ## Community
  - [Discord chatroom](https://discord.gg/MUpMjP2) - Get support or discuss the project
  -- [Good First Issues](https://github.com/spotify/backstage/labels/good%20first%20issue) - Start here if you want to contribute
  +- [Good First Issues](https://github.com/spotify/backstage/contribute) - Start here if you want to contribute
  - [RFCs](https://github.com/spotify/backstage/labels/rfc) - Help shape the technical direction
  - [FAQ](docs/FAQ.md) - Frequently Asked Questions
  - [Code of Conduct](CODE_OF_CONDUCT.md) - This is how we roll
  