fix: it is read-replica not read_replica

Author: hunleyd

audit-specs/baselines/ami-build/files-postgres-config.yml

@@ -61,7 +61,7 @@ file:
     owner: postgres
     group: postgres
     mode: '0664'
-  /etc/postgresql-custom/read_replica.conf:
+  /etc/postgresql-custom/read-replica.conf:
     exists: true
     filetype: file
     owner: postgres