Bump winston from 3.14.2 to 3.15.0 in /lambda (openhab#710)

Bumps [winston](https://github.com/winstonjs/winston) from 3.14.2 to 3.15.0.
- [Release notes](https://github.com/winstonjs/winston/releases)
- [Changelog](https://github.com/winstonjs/winston/blob/master/CHANGELOG.md)
- [Commits](winstonjs/winston@v3.14.2...v3.15.0)

---
updated-dependencies:
- dependency-name: winston
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

lambda/package.json

@@ -30,7 +30,7 @@
     "agentkeepalive": "^4.5.0",
     "axios": "^1.7.7",
     "uuid": "^10.0.0",
-    "winston": "^3.14.2"
+    "winston": "^3.15.0"
   },
   "devDependencies": {
     "@eslint/js": "^9.13.0",