Bump @babel/core from 7.28.3 to 7.28.4 in /src/pretix/static/npm_dir (#5506)

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.28.3 to 7.28.4.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.28.4/packages/babel-core)

---
updated-dependencies:
- dependency-name: "@babel/core"
  dependency-version: 7.28.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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src/pretix/static/npm_dir/package.json

@@ -4,7 +4,7 @@
   "private": true,
   "scripts": {},
   "dependencies": {
-    "@babel/core": "^7.28.3",
+    "@babel/core": "^7.28.4",
     "@babel/preset-env": "^7.28.3",
     "@rollup/plugin-babel": "^6.0.4",
     "@rollup/plugin-node-resolve": "^16.0.1",