docs(linter): update custom plugin issue link (#352)

Author: cjpearson

src/docs/guide/usage/linter/plugins.md

@@ -10,7 +10,7 @@ most rules in `recommended` configs already implemented.
 :::warning
 Oxlint does not support custom plugins at this time. We have plans to implement
 this in the future. You can track its status on [our
-backlog](https://github.com/oxc-project/backlog/issues/40).
+backlog](https://github.com/oxc-project/backlog/issues/9905) and provide feedback in [this discussion](https://github.com/oxc-project/oxc/discussions/10342).
 :::
 
 ## Enabling Plugins