Update read strategies blog

[mo-amzn]

Update read strategies blog to include the AZAffinityReplicasAndPrimary read strategy

[avifenesh]

Done? @Muhammad-awawdi-amazon

[mo-amzn]

PR:
valkey-io/valkey-io.github.io#236

[github-actions]

This issue is inactive for 90 days, hence marked as stale, if the issue is still relevant please perform some activity