Update dependency hexo to v6 [SECURITY]

Author: renovate[bot]

package.json

@@ -13,7 +13,7 @@
     "version": "npx hexo version"
   },
   "dependencies": {
-    "hexo": "^3.9.0",
+    "hexo": "^6.0.0",
     "hexo-deployer-git": "^2.0.0",
     "hexo-generator-archive": "^1.0.0",
     "hexo-generator-category": "^1.0.0",