Update src/triagebot/backport.md

Co-authored-by: Urgau <[email protected]>

Author: apiraino

src/triagebot/backport.md

@@ -8,7 +8,7 @@ The triagebot can be configured to scan every new patch in the git repository an
 
 [regression-beta]: https://github.com/rust-lang/rust/issues?q=is%3Aissue%20label%3Aregression-from-stable-to-beta
 [backports]: ../compiler/backports.md#backports
-[zulip-chat]: https://forge.rust-lang.org/platforms/zulip.html
+[zulip-chat]: ../platforms/zulip.md
 [zulip-backport-poll]: https://rust-lang.zulipchat.com/#narrow/channel/474880-t-compiler.2Fbackports/topic/.23143509.3A.20beta-nominated/with/527517416
 [gh-assoc-issue-patched]: https://docs.github.com/en/issues/tracking-your-work-with-issues/creating-issues/linking-a-pull-request-to-an-issue