Update mariadb Docker tag to v11.3 (#232)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| mariadb | service | minor | `11.2` -> `11.3` |

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.github/workflows/analysis-coverage.yml

@@ -53,7 +53,7 @@ jobs:
 
     services:
       mariadb:
-        image: mariadb:11.2
+        image: mariadb:11.3
         env:
           MARIADB_ROOT_PASSWORD: rootpassword
           MYSQL_DATABASE: nextcloud
@@ -460,7 +460,7 @@ jobs:
 
     services:
       mariadb:
-        image: mariadb:11.2
+        image: mariadb:11.3
         env:
           MARIADB_ROOT_PASSWORD: rootpassword
           MYSQL_DATABASE: nextcloud