Issue #3272785 by tedbow: mispelling "Multisites"

package_manager/src/Validator/MultisiteValidator.php

@@ -41,7 +41,7 @@ class MultisiteValidator implements PreOperationStageValidatorInterface {
   public function validateStagePreOperation(PreOperationStageEvent $event): void {
     if ($this->isMultisite()) {
       $event->addError([
-        $this->t('Multisites are not supported by Package Manager.'),
+        $this->t('Drupal multisite is not supported by Package Manager.'),
       ]);
     }
   }

package_manager/tests/src/Kernel/MultisiteValidatorTest.php

@@ -24,7 +24,7 @@ class MultisiteValidatorTest extends PackageManagerKernelTestBase {
         TRUE,
         [
           ValidationResult::createError([
-            'Multisites are not supported by Package Manager.',
+            'Drupal multisite is not supported by Package Manager.',
           ]),
         ],
       ],