Change assertion to validate ExtractionResponse

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: ianardee

src/test/java/com/mindee/v2/parsing/LocalResponseTest.java

@@ -27,7 +27,7 @@ private static void AssertLocalResponse(LocalResponse localResponse) {
     assertTrue(localResponse.isValidHmacSignature(DUMMY_SECRET_KEY, SIGNATURE));
 
     ExtractionResponse response = localResponse.deserializeResponse(ExtractionResponse.class);
-    assertNotNull(localResponse, "Loaded InferenceResponse must not be null");
+    assertNotNull(response, "Loaded ExtractionResponse must not be null");
     assertEquals(
       "12345678-1234-1234-1234-123456789abc",
       response.getInference().getModel().getId(),