Bump @jest/transform from 30.0.2 to 30.0.4 in /src

Bumps [@jest/transform](https://github.com/jestjs/jest/tree/HEAD/packages/jest-transform) from 30.0.2 to 30.0.4.
- [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/v30.0.4/packages/jest-transform)

---
updated-dependencies:
- dependency-name: "@jest/transform"
  dependency-version: 30.0.4
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

src/package-lock.json

@@ -17,7 +17,7 @@
     "@google-cloud/functions-framework": "4.0.0"
   },
   "devDependencies": {
-    "@jest/transform": "^30.0.0-beta.3",
+    "@jest/transform": "^30.0.4",
     "jest": "30.0.3",
     "supertest": "7.1.3"
   },