Bump the react group across 1 directory with 2 updates

Bumps the react group with 2 updates in the / directory: [react](https://github.com/react/react/tree/HEAD/packages/react) and [react-dom](https://github.com/react/react/tree/HEAD/packages/react-dom).


Updates `react` from 18.3.1 to 19.3.0
- [Release notes](https://github.com/react/react/releases)
- [Changelog](https://github.com/react/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/react/react/commits/v19.3.0/packages/react)

Updates `react-dom` from 18.3.1 to 19.3.0
- [Release notes](https://github.com/react/react/releases)
- [Changelog](https://github.com/react/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/react/react/commits/v19.3.0/packages/react-dom)

---
updated-dependencies:
- dependency-name: react
  dependency-version: 19.2.8
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: react
- dependency-name: react-dom
  dependency-version: 19.2.8
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: react
...

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

Author: dependabot[bot]

package-lock.json

@@ -18,8 +18,8 @@
     "js-cookie": "^3.0.7",
     "lodash": "^4.18.1",
     "luxon": "^3.7.2",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
+    "react": "^19.3.0",
+    "react-dom": "^19.3.0",
     "react-markdown": "^10.1.0",
     "react-router": "^7.18.2"
   },
@@ -34,7 +34,7 @@
     "@lingui/cli": "^6.9.0",
     "@ls-lint/ls-lint": "^2.3.1",
     "@trivago/prettier-plugin-sort-imports": "^6.0.0",
-    "@types/react": "^18.3.2",
+    "@types/react": "^19.3.0",
     "babel-loader": "^10.0.0",
     "clean-webpack-plugin": "^4.0.0",
     "copy-webpack-plugin": "^14.0.0",