build(deps-dev): bump @nextcloud/babel-config in /build/frontend-legacy

Bumps [@nextcloud/babel-config](https://github.com/nextcloud-libraries/babel-config) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/nextcloud-libraries/babel-config/releases)
- [Changelog](https://github.com/nextcloud-libraries/babel-config/blob/main/CHANGELOG.md)
- [Commits](https://github.com/nextcloud-libraries/babel-config/compare/v1.2.0...v1.3.0)

---
updated-dependencies:
- dependency-name: "@nextcloud/babel-config"
  dependency-version: 1.3.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

build/frontend-legacy/package.json

@@ -106,7 +106,7 @@
     "@babel/node": "^7.28.0",
     "@babel/plugin-transform-private-methods": "^7.27.1",
     "@babel/preset-typescript": "^7.28.5",
-    "@nextcloud/babel-config": "^1.2.0",
+    "@nextcloud/babel-config": "^1.3.0",
     "@nextcloud/typings": "^1.9.1",
     "@nextcloud/webpack-vue-config": "^7.0.1",
     "@pinia/testing": "^0.1.7",