npm: bump @rollup/plugin-babel from 6.0.3 to 6.0.4

Bumps [@rollup/plugin-babel](https://github.com/rollup/plugins/tree/HEAD/packages/babel) from 6.0.3 to 6.0.4.
- [Changelog](https://github.com/rollup/plugins/blob/master/packages/babel/CHANGELOG.md)
- [Commits](https://github.com/rollup/plugins/commits/babel-v6.0.4/packages/babel)

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

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -64,7 +64,7 @@
     "@babel/register": "^7.22.15",
     "@open-wc/testing": "^3.2.0",
     "@openapitools/openapi-generator-cli": "^2.7.0",
-    "@rollup/plugin-babel": "^6.0.3",
+    "@rollup/plugin-babel": "^6.0.4",
     "@rollup/plugin-node-resolve": "^15.2.3",
     "@shoelace-style/shoelace": "^2.9.0",
     "@web/test-runner": "^0.16.1",