add beta thumb img

www/data/Announcements.json

@@ -3,10 +3,8 @@
     "type": "Announcement",
     "title": "Beta launch",
     "description": "We're excitied to announce we have moved from Alpha to Beta",
-    "imgUrl": "images/case-study-monitoro.jpg",
-    "logoUrl": "images/logos/monitoro.png",
-    "organization": "Monitoro",
-    "url": "/casestudies/monitoro",
+    "imgUrl": "images/post-beta.jpg",
+    "url": "new/beta",
     "postMeta": {
       "name" : "Paul Copplestone",
       "avatarUrl": "https://avatars0.githubusercontent.com/u/10214025?v=4",