Update mariadb Docker tag to v12

arcade-system/romm.yaml

@@ -388,7 +388,7 @@ spec:
     spec:
       containers:
         - name: mariadb
-          image: mariadb:11
+          image: mariadb:12
           env:
             - name: MARIADB_ROOT_PASSWORD
               valueFrom:

bookstack-system/bookstack.yaml

@@ -71,7 +71,7 @@ spec:
     spec:
       containers:
         - name: mariadb
-          image: mariadb:11
+          image: mariadb:12
           imagePullPolicy: IfNotPresent
           env:
             - name: MYSQL_ROOT_PASSWORD

glance-system/glance-helper.yaml

@@ -1384,7 +1384,7 @@ spec:
         # Calendar iCal URLs (JSON object: {"name": "url", ...})
         - name: CALENDAR_ICAL_URLS
           value: '{"Órák": "https://calendar.google.com/calendar/ical/b2884faf3db792ac082a6206057552c79080716efd5f966e169a41fc500e1c1c%40group.calendar.google.com/private-0998d8053909ba4449c2f0a6409ce3de/basic.ics", "Családi": "https://calendar.google.com/calendar/ical/nitq3l0if4gn54k438obat5ia0%40group.calendar.google.com/private-59afcf70fee1a798ec369b86d9883b46/basic.ics"}'
-        image: python:3.14-bookworm
+        image: python:3.12-bookworm
         imagePullPolicy: IfNotPresent
         name: glance-helper
         ports: