Update dependency disqusjs to v3.1.0

Author: renovate[bot]

package.json

@@ -22,7 +22,7 @@
     "algoliasearch": "5.20.2",
     "animate.css": "3.1.1",
     "animejs": "3.2.1",
-    "disqusjs": "3.0.2",
+    "disqusjs": "3.1.0",
     "firebase": "11.1.0",
     "gitalk": "1.8.0",
     "hexo-generator-searchdb": "1.4.1",