SDK-1613 minor changelog format update

Author: echo-branch

ChangeLog.md

@@ -1,9 +1,9 @@
 Branch iOS SDK Change Log
 
 v.2.0.0
+
 Branch iOS SDK 2.0.0 fixes longstanding issues with the umbrella header and project layout.
 Although the code is largely unchanged, this changes the SDK name from Branch to BranchSDK.
-
 Clients will need to update all import statements from `import Branch` to `import BranchSDK`.
 
 - SDK-1329 - SDK umbrella header fix