Fixlink (#110)

* Updating the community list for Alex

Signed-off-by: Mary Anthony <mary@blockstack.com>

* Fixing link for Alex

Signed-off-by: Mary Anthony <mary@blockstack.com>

_data/community.json

@@ -2,10 +2,10 @@
   "resources" :[
     {
     "title": "Blockstack + React: A TechRally Presentation",
-    "url": "https://www.youtube.com/channel/UCtXf2lbDGQe7h-PpqpAoFig",
+    "url": "https://www.youtube.com/watch?v=Arb-dwU5SZI&list=PLDQHh6RjV5oUJNbtnzV11VVghiJTPJ5Wv",
     "type": "video",
     "date": "01-01-2019",
-    "description": "A series of short videos that takes users through the process of building a decentralized application (DApp) with Blockstack and React.  "
+    "description": "A series of short videos that takes users through the process of building a decentralized application (DApp) with Blockstack and React."
   },
   {
     "title": "Building decentralized apps with blockstack.js",