docs: add contribute to docs section

docs/tools-and-processes/contribute.md

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+---
+title: Contribute to Docs
+weight: 10
+---
+
+## Contribute to Docs
+
+These are some ways to get your first task:
+
+1. <b>Work on existing docs’ issues</b>: Look for issues with the ‘docs, ’ ‘documentation,’ ‘area/docs,’ and ‘good-first-issue’ tags on the [Docs Project board](https://github.com/orgs/asyncapi/projects/12).
+
+2. <b>Update current docs</b>: Surf the existing documentation, look for typos, grammar, and errors, create an issue, and send a Pull Request. 
+
+3. <b>Propose new docs</b>: If you have any ideas or suggestions for necessary documentation, create an issue and ask for help to work on the task.
+
+4. <b>Connect with a docs mentor</b>: Send a DM via [Slack](https://www.asyncapi.com/slack-invite) to Alejandra Quetzalli to get assigned to a task.
+