Update dependency gh-pages to v6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package-lock.json

@@ -45,7 +45,7 @@
     "eslint-config-react-app": "7.0.1",
     "eslint-plugin-prettier": "4.2.1",
     "eslint-plugin-react": "7.32.2",
-    "gh-pages": "5.0.0",
+    "gh-pages": "6.0.0",
     "prettier": "2.8.8"
   },
   "prettier": {