Bump @rollup/plugin-babel in /src/pretix/static/npm_dir

Bumps [@rollup/plugin-babel](https://github.com/rollup/plugins/tree/HEAD/packages/babel) from 5.3.1 to 6.0.2.
- [Release notes](https://github.com/rollup/plugins/releases)
- [Changelog](https://github.com/rollup/plugins/blob/master/packages/babel/CHANGELOG.md)
- [Commits](https://github.com/rollup/plugins/commits/babel-v6.0.2/packages/babel)

---
updated-dependencies:
- dependency-name: "@rollup/plugin-babel"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

src/pretix/static/npm_dir/package.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "@babel/core": "^7.19.6",
     "@babel/preset-env": "^7.19.3",
-    "@rollup/plugin-babel": "^5.3.1",
+    "@rollup/plugin-babel": "^6.0.2",
     "@rollup/plugin-node-resolve": "^14.1.0",
     "vue": "^2.7.13",
     "rollup": "^2.79.1",