web: bump rollup from 2.79.1 to 3.28.1 in /web (#6616)

* web: bump rollup from 2.79.1 to 3.28.1 in /web

Bumps [rollup](https://github.com/rollup/rollup) from 2.79.1 to 3.28.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.79.1...v3.28.1)

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

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

* fix rollup build in production

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

---------

Signed-off-by: dependabot[bot] <support@github.com>
Signed-off-by: Jens Langhammer <jens@goauthentik.io>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Jens Langhammer <jens@goauthentik.io>

web/rollup.proxy.mjs

@@ -0,0 +1,3 @@
+import { POLY, standalone } from "./rollup.config.mjs";
+
+export default [POLY, ...standalone];