Bump babel-jest from 30.2.0 to 30.4.1 in /js

Bumps [babel-jest](https://github.com/jestjs/jest/tree/HEAD/packages/babel-jest) from 30.2.0 to 30.4.1.
- [Release notes](https://github.com/jestjs/jest/releases)
- [Changelog](https://github.com/jestjs/jest/blob/main/CHANGELOG.md)
- [Commits](https://github.com/jestjs/jest/commits/v30.4.1/packages/babel-jest)

---
updated-dependencies:
- dependency-name: babel-jest
  dependency-version: 30.4.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

js/package.json

@@ -55,7 +55,7 @@
     "@babel/eslint-parser": "^7.28.6",
     "@babel/preset-env": "^7.29.3",
     "@jupyterlab/builder": "^4.5.7",
-    "babel-jest": "^30.2.0",
+    "babel-jest": "^30.4.1",
     "cpy-cli": "^6.0.0",
     "eslint": "^8.57.1",
     "eslint-config-airbnb": "^19.0.4",