postgresql_script: Add a note about not using the module with files generated by PG utils (ansible-collections#753)

Author: Andersson007

plugins/modules/postgresql_script.py

@@ -17,9 +17,10 @@
 description:
 - Runs arbitrary PostgreSQL statements from a file.
 - The module always reports that the state has changed.
-- Does not run against backup files.
-  Use M(community.postgresql.postgresql_db) with I(state=restore)
-  to run queries on files made by pg_dump/pg_dumpall utilities.
+- Do NOT run the module against files generated by C(pg_dump),
+  C(pg_dumpall), C(pg_restore) and other PostgreSQL utilities.
+- Use M(community.postgresql.postgresql_db) with I(state=restore)
+  to run queries from files generated by C(pg_dump/pg_dumpall).
 
 version_added: '2.1.0'