Bump rollup from 4.9.6 to 4.16.1 in /js

Bumps [rollup](https://github.com/rollup/rollup) from 4.9.6 to 4.16.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.9.6...v4.16.1)

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

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

js/libs/keycloak-js/package.json

@@ -71,7 +71,7 @@
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/plugin-typescript": "^11.1.6",
     "es6-promise": "^4.2.8",
-    "rollup": "^4.9.6",
+    "rollup": "^4.16.1",
     "shx": "^0.3.4"
   },
   "dependencies": {