Automated Project Update Bot fixes

Relates to #3499096. This merge request was automatically created by the Project Update Bot. It contains the changes from run 11-392907.

src/Plugin/ImageAPIOptimizeProcessor/WebP.php

@@ -22,7 +22,7 @@ class WebP extends ConfigurableImageAPIOptimizeProcessorBase {
     if ($source_image) {
       $destination = $image_uri . '.webp';
       // @todo: Add try/catch.
-      imagewebp($source_image->getToolkit()->getResource(), $destination, $this->configuration['quality']);
+      imagewebp($source_image->getToolkit()->getImage(), $destination, $this->configuration['quality']);
       // Fix issue where sometimes image fails to generate.
       if (filesize($destination) % 2 == 1) {
         file_put_contents($destination, "\0", FILE_APPEND);