Nickmccleery/update rmfg og image (#615)

* Update image.

* Remove old image.

Author: nickmccleery

content/documentation-assets/meta-images/case-study-rmfg-1.png

@@ -8,7 +8,7 @@ author:
     name: Zoo Team
     picture: '/documentation-assets/zoo-pfp.png'
 ogImage:
-    url: 'documentation-assets/meta-images/case-study-rmfg.png'
+    url: 'documentation-assets/meta-images/case-study-rmfg-1.png'
 ---
 
 ## Overview