chore(deps): update mariadb docker tag to v10.11

Author: renovate[bot]

.github/workflows/pro_selfhosted.yml

@@ -140,7 +140,7 @@ jobs:
 
     services:
       mariadb:
-        image: mariadb:10.4
+        image: mariadb:10.11
         env:
           MARIADB_ROOT_PASSWORD: p455w0rd
           MARIADB_USER: semaphore
@@ -382,7 +382,7 @@ jobs:
 
     services:
       mariadb:
-        image: mariadb:10.4
+        image: mariadb:10.11
         env:
           MARIADB_ROOT_PASSWORD: p455w0rd
           MARIADB_USER: semaphore