build(deps-dev): bump @types/react-gravatar from 2.6.8 to 2.6.9 (#48)

Bumps [@types/react-gravatar](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-gravatar) from 2.6.8 to 2.6.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-gravatar)

---
updated-dependencies:
- dependency-name: "@types/react-gravatar"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

package-lock.json

@@ -28,7 +28,7 @@
     "web-vitals": "^2.0.1"
   },
   "devDependencies": {
-    "@types/react-gravatar": "^2.6.8",
+    "@types/react-gravatar": "^2.6.9",
     "@types/react-router-dom": "^5.1.7",
     "@typescript-eslint/eslint-plugin": "4.28.1",
     "@typescript-eslint/parser": "4.28.1",