docs(wallet): set changelog PR link to #9300

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: sirtimid

packages/wallet/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- **BREAKING:** Wire `PermissionController` and `SubjectMetadataController` into the default wallet initialization ([#XXXX](https://github.com/MetaMask/core/pull/XXXX))
+- **BREAKING:** Wire `PermissionController` and `SubjectMetadataController` into the default wallet initialization ([#9300](https://github.com/MetaMask/core/pull/9300))
   - Adds optional `instanceOptions.permissionController` (`caveatSpecifications`, `permissionSpecifications`, `unrestrictedMethods`) and `instanceOptions.subjectMetadataController.subjectCacheLimit`.
 
 ## [5.0.0]