fix: Update ApiErrorResponse docstring for consistency and clarity

Signed-off-by: Vishnu Govindaraj <vishnu.govindaraj@emerson.com>

Author: Vishnu Govindaraj

nisystemlink/clients/core/_api_error_response.py

@@ -3,6 +3,6 @@
 
 
 class ApiErrorResponse(JsonModel):
-    """Represents an error response from the SystemLink API responses."""
+    """Represents an error response from the SystemLink APIs."""
 
     error: ApiError

tests/integration/spec/test_spec.py

@@ -251,26 +251,33 @@ def test__get_spec_by_id__spec_matches_expected(
             category="Parametric Specs",
             block="newBlock",
         )
+
         response = create_specs(CreateSpecificationsRequest(specs=[spec]))
+
         assert response is not None
         assert len(response.created_specs) == 1
         created_spec = response.created_specs[0]
 
         get_spec_response = client.get_spec(created_spec.id)
+
         assert isinstance(get_spec_response, Specification)
         assert get_spec_response.id == created_spec.id
         assert get_spec_response.product_id == productId
 
     def test__get_non_existant_spec_by_id__get_spec_fails(self, client: SpecClient):
         non_existant_spec_id = "10"
+
         with pytest.raises(ApiException) as exception_info:
             client.get_spec(non_existant_spec_id)
+
         assert exception_info.value.http_status_code == 404
 
     def test__get_spec_by_invalid_id__get_spec_fails(self, client: SpecClient):
         invalid_spec_id = "110ac9e841879870a0b410dabfa02a0e"
+
         with pytest.raises(ApiException) as exception_info:
             client.get_spec(invalid_spec_id)
+
         assert exception_info.value.http_status_code == 400
 
     def test__query_product__all_returned(