Update 4.3.1 release notes

Includes bug fixes since RC1.

Author: Jonathan S. Katz

docs/content/releases/4.3.1.md

@@ -83,6 +83,7 @@ The usability change allows for one to add namespace to the PostgreSQL Operator'
 
 # Fixes
 - Fix for cloning a PostgreSQL cluster when the pgBackRest repository is stored in S3.
+- The `pgo show namespace` command now properly indicates which namespaces a user is able to access.
 - Ensure the `pgo-apiserver` will successfully run if `PGO_DISABLE_TLS` is set to `true`. Reported by (@zhubx007).
 - Prevent a run of `pgo-deployer` from failing if it detects the existence of dependent cluster-wide objects already present.
 - Deployments with `pgo-deployer` using the default file with `hostpathstorage` will now successfully deploy PostgreSQL clusters without any adjustments.