fix(deps): update dependency marked to v9

Author: renovate[bot]

package.json

@@ -56,7 +56,7 @@
     "es6-promise": "4.2.8",
     "highlight.js": "11.5.1",
     "localforage": "1.10.0",
-    "marked": "4.0.19",
+    "marked": "9.1.6",
     "primer-markdown": "4.0.0"
   },
   "devDependencies": {