Updated the getting started guide to use the correct parameter name
'read_replica_region' instead of 'region' for creating read replicas
using curl
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## Summary by CodeRabbit
* **Documentation**
* Updated the Getting Started guide for Read Replicas with corrected API
request examples for improved accuracy.
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This PR fixes some prettier issues:
- Bump and unify all prettier versions to 3.7.3 across teh whole repo
- Bump the SQL prettier plugin
- When running `test:prettier`, check `mdx` files also
- Run the new prettier format on all files
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Co-authored-by: Joshen Lim <joshenlimek@gmail.com>