Update docs/guides/database-migration.mdx

Co-authored-by: Ryan Cartwright <39504851+HomelessDinosaur@users.noreply.github.com>

Author: tjholm

docs/guides/database-migration.mdx

@@ -251,9 +251,6 @@ jobs:
 - **Rotate credentials regularly** - Implement credential rotation policies
 - **Limit network access** - Use private endpoints or IP allowlisting where possible
 
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 ## With private databases (Cloud SQL, RDS, etc.)
 
 Coming soon...