Fix doctrine mapping

Prior to this change, doctrine would detect changes in the entity mapping vs the actual database schema.

```sql
ALTER TABLE users CHANGE icon icon VARCHAR(255) DEFAULT NULL;
ALTER TABLE public_key_credential_sources CHANGE other_ui other_ui LONGTEXT DEFAULT NULL COMMENT '(DC2Type:array)';
```

This changes tells doctrine the correct MySQL version, so it no longer wants to change the database.

config/packages/doctrine.yaml

@@ -2,7 +2,7 @@ doctrine:
     dbal:
         # configure these for your database server
         driver: 'pdo_mysql'
-        server_version: '5.6'
+        server_version: '10.6.19-MariaDB'
         charset: utf8mb4
         default_table_options:
             charset: utf8mb4