fix: Improve schema testing a bit by providing a readable message with a reference to the failed schema

Author: nissen-chris

modules/thunder_gqls/tests/src/Traits/ThunderGqlsTestTrait.php

@@ -29,7 +29,11 @@ protected function runAndTestQuery(string $schema): void {
 
     $expectedData = $this->jsonDecode($this->getExpectedResponseFromFile($schema))['data'];
 
-    $this->assertEqualsCanonicalizing($expectedData, $responseData);
+    $this->assertEqualsCanonicalizing(
+      $expectedData,
+      $responseData,
+      'The expected schema for "' . $schema . '" did not match the result.'
+    );
   }
 
   /**