chore: fix link [skip ci]

See #2162

Author: posva

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -29,4 +29,4 @@ body:
     attributes:
       value: |
         ## Before creating a feature request make sure that:
-        - This hasn't been [requested before](https://github.com/vuejs/router/issues).
+        - This hasn't been [requested before](https://github.com/vuejs/pinia/issues).