Update modules/ROOT/pages/migration-from-7x.adoc

Author: kemister85

modules/ROOT/pages/migration-from-7x.adoc

@@ -184,7 +184,7 @@ For complete details on license key manager setup and troubleshooting, see xref:
 [discrete]
 === Breaking Changes Overview
 
-IMPORTANT: The following sections detail critical changes that require updates to your code. Please review each section carefully.
+IMPORTANT: The following sections detail important changes that require updates to your code. Please review each section carefully.
 
 === Removed Methods