Bump prettier from 3.6.2 to 3.7.3 in /express

Bumps [prettier](https://github.com/prettier/prettier) from 3.6.2 to 3.7.3.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@3.6.2...3.7.3)

---
updated-dependencies:
- dependency-name: prettier
  dependency-version: 3.7.3
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

express/package.json

@@ -15,6 +15,6 @@
     "morgan": "~1.10.1"
   },
   "devDependencies": {
-    "prettier": "^3.6.2"
+    "prettier": "^3.7.3"
   }
 }