Bump @babel/core from 7.28.3 to 7.28.4

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:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -5,7 +5,7 @@
   "description": "Scala初学者がScalaを学ぶためのテキスト",
   "scripts": {},
   "devDependencies": {
-    "@babel/core": "^7.28.3",
+    "@babel/core": "^7.28.4",
     "@babel/preset-env": "^7.27.2",
     "@babel/register": "^7.28.3",
     "babel-preset-power-assert": "3.0.0",