Merge pull request moodlehq#173 from stronk7/mariadb_10.5_sticky

Make mariadb:10.5 sticky

Author: sarjona

db.mariadb.yml

@@ -5,7 +5,7 @@ services:
       MOODLE_DOCKER_DBTYPE: mariadb
       MOODLE_DOCKER_DBCOLLATION: utf8mb4_bin
   db:
-    image: mariadb:10
+    image: mariadb:10.5
     command: >
               --character-set-server=utf8mb4
               --collation-server=utf8mb4_bin