fix: patch for issue 3463730 - strip HTTP/ from version

Closes #3463730

src/Plugin/HttpApiPluginBase.php

@@ -285,6 +285,12 @@ abstract class HttpApiPluginBase extends PluginBase implements ContainerFactoryP
    * {@inheritdoc}
    */
   public function preprocessOutgoingRequestOptions(array $options): array {
+    if (
+      isset($options['version']) &&
+      substr($options['version'], 0, 5) == 'HTTP/'
+    )  {
+      $options['version'] = substr($options['version'], 5);
+    }
     return $options;
   }