[NC] Bump MariaDB version

pica-nextcloud/docker-compose-pica.yml

@@ -50,7 +50,7 @@ services:
     restart: unless-stopped
 
   nextcloud-db:
-    image: mariadb:10.3.17
+    image: mariadb:10.5.5
     container_name: nextcloud-db
     volumes:
       - nextcloud-db:/var/lib/mysql