docs: adjust fork attribution wording in README and get-help

Author: OffgridwithJD

README.md

@@ -114,6 +114,5 @@ releases are built. All C code follows the
 
 ## License
 
-`open_pg_tde` is derived from Percona `pg_tde` and is distributed under the
-PostgreSQL License. It retains the original copyright for the derived work.
+`open_pg_tde` is distributed under the PostgreSQL License. It retains the original copyright for the derived work.
 Command Prompt, Inc. maintains `open_pg_tde` and is not affiliated with Percona.

documentation/docs/get-help.md

@@ -24,5 +24,5 @@ for how to report them privately.
 
 ## About the project
 
-`open_pg_tde` is an open fork of Percona's `pg_tde`, maintained by
+`open_pg_tde` is an open fork of `pg_tde`, maintained by
 [Command Prompt, Inc.](https://www.commandprompt.com)