[patch] update default subscription

Author: terc1997

src/mas/devops/data/catalogs/v9-260318-amd64.yaml

@@ -24,7 +24,7 @@ cp4d_platform_version: 5.2.0+20250709.170324               # Operator version 5.
 ibm_zen_version: 6.2.0+20250530.152516.232                     # For CPD5 ibm-zen has to be explicitily mirrored
 
 db2u_version: 7.6.0+20260224.123157.19264    # Operator version 110509.0.6 to find the version 7.3.1+20250821.161005.16793, search db2u-operator digest on repo (https://github.com/IBM/cloud-pak/tree/master/repo/case/ibm-db2uoperator)
-db2_channel_default: v120102.0               # Default Channel version for db2u-operator
+db2_channel_default: v120104.0               # Default Channel version for db2u-operator
 events_version: 5.0.1                        # Operator version 5.0.1 (https://github.com/IBM/cloud-pak/tree/master/repo/case/ibm-events-operator)
 uds_version: 2.0.12                          # Operator version 2.0.12 # sticking to 2.0.12 version # Please do Not Change
 sls_version: 3.12.6     # No Update          # Operator version 3.12.5 (https://github.ibm.com/maximoappsuite/ibm-sls/releases)