feat: add highlighted projects into top nav

Author: danielgolden

src/data/navigation.json

@@ -9,6 +9,11 @@
       "label": "New Relic Projects",
       "link": "/explore-projects",
       "order": 2
+    },
+    {
+      "label": "Highlighted Projects",
+      "link": "/collections",
+      "order": 3
     }
   ]
 }