Update docs/cdk/how-to/migrate/7-8.md

Co-authored-by: Sharonbc01 <150273361+Sharonbc01@users.noreply.github.com>

Author: kmurphypolygon

docs/cdk/how-to/migrate/7-8.md

@@ -3,7 +3,7 @@ This document shows Polygon partners how to migrate a CDK stack from fork 7 to f
 !!! tip
     This process is done collaboratively with Polygon the CDK team.
 
-## Process to upgrade from fork 7 to 8
+## Process to upgrade from fork 7 to 8 for isolated CDK chains
 
 1. CDK owners make an upgrade request to Polygon.