Michael Nielson
--- a/core/modules/system/system.post_update.php
+++ b/core/modules/system/system.post_update.php
    \Drupal::service('module_installer')->uninstall(['sdc'], FALSE);
  }
 }
+
+/**
+ * Update the WEBP quality setting to default value.
+ */
+function system_post_update_webp_quality_default_value() {
-function system_post_update_webp_quality_default_value() {
+function system_post_update_webp_quality_default_value(): void {
--- a/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
+++ b/core/modules/system/src/Plugin/ImageToolkit/GDToolkit.php
      '#default_value' => $this->configFactory->getEditable('system.image.gd')->get('jpeg_quality', FALSE),
      '#field_suffix' => $this->t('%'),
    ];
+
+    // In PHP 8.1+, the GD extension supports lossless encoding,