Update eslint requirement from ^8.50.0 to ^8.51.0

Updates the requirements on [eslint](https://github.com/eslint/eslint) to permit the latest version.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v8.50.0...v8.51.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -25,7 +25,7 @@
     "url": "https://etherpad.org/"
   },
   "devDependencies": {
-    "eslint": "^8.50.0",
+    "eslint": "^8.51.0",
     "eslint-config-etherpad": "^3.0.22",
     "typescript": "^4.9.5"
   },