Text-Update forkid-9-12.md

Author: mitchpolygon

docs/cdk/how-to/migrate/forkid-9-12.md

@@ -155,7 +155,7 @@ go run ./zk/debug_tools/datastream-host \
 
 3. Stop all services (node, prover/executor, bridge).
 
-> 💡 For an **isolated chain not attached to the Polygon Agglayer**, the chain admin can perform operational step 6 on their chain’s rollup manager contract. Polygon is not involved.
+> 💡 For an **isolated chain not attached to the Agglayer**, the chain admin can perform operational step 4 on their chain’s rollup manager contract. Polygon is not involved.
 
 1. **Please Note:** Wait for Polygon to send the L1 transaction (tx) and confirm it.
 2. **Polygon:** Upgrade the Smart Contract (multisig):