Add MaptimeFredonia twitter

Author: geobrando

_data/chapters.json

@@ -2934,7 +2934,7 @@
       "properties": {
         "location": "Fredonia, NY",
         "title": "MaptimeFredonia",
-        "twitter": "",
+        "twitter": "MaptimeF",
         "website": "",
         "meetup": "",
         "comingSoon": true,