Added backlink to docs

Author: danciaclara

mint.json

@@ -25,6 +25,11 @@
     "url": "https://app.plane.so/sign-in"
   },
   "anchors": [
+    {
+      "name": "Documentation",
+      "icon": "book",
+      "url": "https://docs.plane.so/"
+    },
     {
       "name": "Discord",
       "icon": "discord",
@@ -239,5 +244,5 @@
     "ga4": {
         "measurementId": "G-G578SD4VZD"
     }
-}
+  }
 }