Update pgAdmin default to version 9.11

Issue: PGO-2838

Author: tjmoore4

components/image-pgadmin/Dockerfile

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 ARG BASE_VERSION=ubi9
-ARG PGADMIN4_VERSION=9.8
+ARG PGADMIN4_VERSION=9.11
 ARG PYTHON_VERSION=3.11
 ARG PG_MAJOR=18