Bump react-dropzone from 14.3.8 to 15.0.0

Bumps [react-dropzone](https://github.com/react-dropzone/react-dropzone) from 14.3.8 to 15.0.0.
- [Release notes](https://github.com/react-dropzone/react-dropzone/releases)
- [Commits](https://github.com/react-dropzone/react-dropzone/compare/v14.3.8...v15.0.0)

---
updated-dependencies:
- dependency-name: react-dropzone
  dependency-version: 15.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

packages/napcat-webui-frontend/package.json

@@ -74,7 +74,7 @@
     "quill": "^2.0.3",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
-    "react-dropzone": "^14.3.5",
+    "react-dropzone": "^15.0.0",
     "react-error-boundary": "^5.0.0",
     "react-hook-form": "^7.54.2",
     "react-hot-toast": "^2.4.1",