build(deps-dev): bump eslint from 8.50.0 to 8.51.0 in /src (#5969)

Bumps [eslint](https://github.com/eslint/eslint) from 8.50.0 to 8.51.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v8.50.0...v8.51.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-type: direct:development
  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>

src/package.json

@@ -78,7 +78,7 @@
     "etherpad-lite": "node/server.js"
   },
   "devDependencies": {
-    "eslint": "^8.50.0",
+    "eslint": "^8.51.0",
     "eslint-config-etherpad": "^3.0.22",
     "etherpad-cli-client": "^2.0.2",
     "mocha": "^10.0.0",