Fix typo (#367)

Signed-off-by: Walter Hugo Lopez Pinaya <ianonimato@hotmail.com>

Author: Warvito

tests/test_compute_fid_metric.py

@@ -19,7 +19,7 @@
 from generative.metrics import FIDMetric
 
 
-class TestMMDMetric(unittest.TestCase):
+class TestFIDMetric(unittest.TestCase):
     def test_results(self):
         x = torch.Tensor([[1, 2], [1, 2], [1, 2]])
         y = torch.Tensor([[2, 2], [1, 2], [1, 2]])