Update CHANGELOG.md

Author: paddycarver

CHANGELOG.md

@@ -5,6 +5,7 @@ ENHANCEMENTS
 * Support `Unwrap` on SDK errors [GH-647]
 * Allow for `nil` errors in `diag.FromErr` [GH-623]
 * Added `validation.ToDiagFunc` helper to translate legacy validation functions into Diagnostics-aware validation functions. [GH-611]
+* Disable Checkpoint network connections during acceptance testing unless a Terraform binary needs to be installed. [GH-663]
 
 BUG FIXES