Bump react-bootstrap from 2.9.0 to 2.9.1 in /frontend (#24)

Bumps [react-bootstrap](https://github.com/react-bootstrap/react-bootstrap) from 2.9.0 to 2.9.1.
- [Release notes](https://github.com/react-bootstrap/react-bootstrap/releases)
- [Changelog](https://github.com/react-bootstrap/react-bootstrap/blob/master/CHANGELOG.md)
- [Commits](https://github.com/react-bootstrap/react-bootstrap/compare/v2.9.0...v2.9.1)

---
updated-dependencies:
- dependency-name: react-bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -16,7 +16,7 @@
     "downloadjs": "^1.4.7",
     "pdf-lib": "^1.17.1",
     "react": "^18.2.0",
-    "react-bootstrap": "^2.9.0",
+    "react-bootstrap": "^2.9.1",
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.17.0",
     "react-scripts": "5.0.1",