build(deps-dev): bump prettier from 3.3.3 to 3.4.2 in /webapp

Bumps [prettier](https://github.com/prettier/prettier) from 3.3.3 to 3.4.2.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/3.3.3...3.4.2)

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

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

webapp/package.json

@@ -37,7 +37,7 @@
     "eslint": "^9.14.0",
     "eslint-plugin-vue": "^9.30.0",
     "npm-run-all": "^4.1.5",
-    "prettier": "^3.3.3",
+    "prettier": "^3.4.2",
     "pulltorefreshjs": "^0.1.22",
     "sass": "=1.77.6",
     "terser": "^5.36.0",