Plugins: Use proper contribution documentation link

Community: Issue 12313
Change-Id: Iff9f587e740d8ddcfe8377e6344c782b25451700
diff --git a/tools/plugins.md.template b/tools/plugins.md.template
index 9bdbfed..90329d7 100644
--- a/tools/plugins.md.template
+++ b/tools/plugins.md.template
@@ -76,7 +76,7 @@
 
 
 [ci-scripts]: https://gerrit.googlesource.com/gerrit-ci-scripts/+/refs/heads/master/jenkins/
-[Contributions]: https://gerrit-review.googlesource.com/Documentation/index.html#_about_gerrit
+[Contributions]: https://gerrit-review.googlesource.com/Documentation/dev-community.html#how-to-contribute
 [core]: https://gerrit-review.googlesource.com/Documentation/config-plugins.html#core-plugins
 [mailing]: https://www.gerritcodereview.com/support.html#general-support
 [maintainers]: https://www.gerritcodereview.com/members.html#maintainers