chore: bump rollup in /src/assets/js in the all-deps group

Bumps the all-deps group in /src/assets/js with 1 update: [rollup](https://github.com/rollup/rollup).


Updates `rollup` from 4.20.0 to 4.21.0
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.20.0...v4.21.0)

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

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

src/assets/js/package.json

@@ -7,6 +7,6 @@
     "@rollup/plugin-node-resolve": "^15.2.1",
     "@rollup/plugin-terser": "^0.4.3",
     "@web/rollup-plugin-copy": "^0.5.1",
-    "rollup": "^4.20.0"
+    "rollup": "^4.21.0"
   }
 }