Rename 7-8.md to fork.md

Author: kmurphypolygon

docs/cdk/how-to/migrate/7-8.md docs/cdk/how-to/migrate/fork.mddocs/cdk/how-to/migrate/7-8.md renamed to docs/cdk/how-to/migrate/fork.md

@@ -70,4 +70,4 @@ Follow the steps to verify all batches for upgrading.
     3. `SequenceSender.WaitPeriodSendSequence = "60s”` # restore previous value
     4. `SequenceSender.LastBatchVirtualizationTimeMaxWaitPeriod = “600s”` # restore previous value
 
-7. Restart sequencer, sequence-sender, and aggregator.
+7. Restart sequencer, sequence-sender, and aggregator.