fix(deps): update dependency hexo to v8

Author: renovate[bot]

package.json

@@ -13,7 +13,7 @@
     "version": "7.2.0"
   },
   "dependencies": {
-    "hexo": "^7.2.0",
+    "hexo": "^8.0.0",
     "hexo-asset-image": "^1.0.0",
     "hexo-asset-link": "^2.2.3",
     "hexo-generator-archive": "^2.0.0",