Update pg_hba.conf template to work with repmgr
We need to add entries to pg_hba.conf as documented in #1807 (comment 31216296)
As of 2024-05-14 a change has been implemented to enforce access token expiry. If you see higher numbers of HTTP 401 responses, please check tokens that may have expired. For more details, including how to mitigate disruption, please check our docs guide on Expired Access Tokens. If you have a support contract, you may open a support ticket for additional assistance.
We need to add entries to pg_hba.conf as documented in #1807 (comment 31216296)