Bump react-router-dom in /templates/react-javascript (#665)

Bumps [react-router-dom](https://github.com/remix-run/react-router/tree/HEAD/packages/react-router-dom) from 6.28.0 to 6.29.0.
- [Release notes](https://github.com/remix-run/react-router/releases)
- [Changelog](https://github.com/remix-run/react-router/blob/main/CHANGELOG.md)
- [Commits](https://github.com/remix-run/react-router/commits/[email protected]/packages/react-router-dom)

---
updated-dependencies:
- dependency-name: react-router-dom
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

templates/react-javascript/package-lock.json

@@ -7,7 +7,7 @@
     "@trussworks/react-uswds": "^9.0.0",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-router-dom": "^6.28.0",
+    "react-router-dom": "^6.29.0",
     "workbox-background-sync": "^7.0.0",
     "workbox-broadcast-update": "^7.0.0",
     "workbox-cacheable-response": "^7.0.0",