Add another example to question about backward compatibility (#2242)

Author: ekzyis

.github/pull_request_template.md

@@ -12,7 +12,7 @@ _Was anything unclear during your work on this PR? Anything we should definitely
 
 **Are your changes backward compatible? Please answer below:**
 
-_For example, a change is not backward compatible if you removed a GraphQL field._
+_For example, a change is not backward compatible if you removed a GraphQL field or dropped a database column._
 
 **On a scale of 1-10 how well and how have you QA'd this change and any features it might affect? Please answer below:**