Issue #3386135: Fix module so conversion to 11.x core merge request works

package_manager/src/Validator/ComposerPluginsValidator.php

@@ -67,6 +67,7 @@ final class ComposerPluginsValidator implements EventSubscriberInterface {
     'cweagans/composer-patches' => '^1.7.3',
     // @see \Drupal\package_manager\PathExcluder\VendorHardeningExcluder
     'drupal/core-vendor-hardening' => '*',
+    'php-http/discovery' => '*',
     // cSpell:enable
   ];