Add alias for contributions page (#3111)

doc/content/en/project/Contributors onboarding guide/_index.md

@@ -2,6 +2,8 @@
 title: "Contributor onboarding guide"
 linkTitle: "Contributor onboarding guide"
 weight: 8
+aliases:
+  - /docs/contribution-guidelines
 ---
 
 <!--
@@ -36,4 +38,4 @@ weight: 8
 7. Work on your contribution: Once you have a clear understanding of the contribution you want to make, you can start working on it. Make sure to follow the Apache Avro coding guidelines and best practices to ensure that your code is of high quality.
 8. Submit your contribution: When you're ready to submit your contribution, create a pull request in the Apache Avro GitHub repository. Make sure to include a detailed description of your changes, and any relevant documentation or test cases.
 9. Participate in reviews: Once you've submitted your contribution, it will be reviewed by other contributors. You may need to make additional changes based on their feedback before your contribution is accepted.
-Celebrate your contribution: Once your contribution has been accepted, celebrate your achievement! You've helped improve Apache Avro and contributed to the open-source community.
+Celebrate your contribution: Once your contribution has been accepted, celebrate your achievement! You've helped improve Apache Avro and contributed to the open-source community.