Bump rollup from 4.21.2 to 4.21.3 in the rollup group

Bumps the rollup group with 1 update: [rollup](https://github.com/rollup/rollup).


Updates `rollup` from 4.21.2 to 4.21.3
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v4.21.2...v4.21.3)

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

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

package.json

@@ -94,7 +94,7 @@
     "postcss-scss": "^4.0.9",
     "prettier": "^3.3.3",
     "puppeteer": "^23.3.0",
-    "rollup": "^4.21.2",
+    "rollup": "^4.21.3",
     "sass-export": "^2.1.2",
     "serve-static": "^1.16.0",
     "sitemap": "^8.0.0",