chore: Update changelog PR number to #3957

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: sirtimid

packages/snaps-execution-environments/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
-- Export endowment factories via `@metamask/snaps-execution-environments/endowments` sub-path ([#XXXX](https://github.com/MetaMask/snaps/pull/XXXX))
+- Export endowment factories via `@metamask/snaps-execution-environments/endowments` sub-path ([#3957](https://github.com/MetaMask/snaps/pull/3957))
   - Exports endowment factory modules: `timeout`, `interval`, `date`, `textEncoder`, `textDecoder`, `crypto`, `math`
 
 ## [11.0.2]