Update ci.yml

Author: flohdez

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         php-version: ['8.1', '8.2', '8.3']
-        db-type: [sqlite, mysql, pgsql]
+        db-type: ['sqlite', 'mysql', 'pgsql']
         prefer-lowest: ['']
 
     steps: