Issue #3260342: Config schema for effects are missing

imagick.module

 <?php
+
+/**
+ * Implements hook_config_schema_info_alter().
+ */
+function imagick_config_schema_info_alter(&$definitions) {
+  $definitions['image.effect.image_convert']['mapping']['format'] = [
+    'type' => 'string',
+    'label' => 'Image format',
+  ];
+  $definitions['image.effect.image_convert']['mapping']['quality'] = [
+    'type' => 'integer',
+    'label' => 'Image quality',
+  ];
+}