Added newscommentary_v10 spanish

wmt_utils.py

@@ -272,7 +272,7 @@ _TRAIN_SUBSETS = [
     SubDataset(
         name="newscommentary_v10",
         target="en",
-        sources={"cs", "de", "fr", "ru", "es"},
+        sources={"cs", "de", "fr", "ru", "es"},  # es-en added
         url="https://huggingface.co/datasets/wmt/wmt15/resolve/main-zip/training-parallel-nc-v10.zip",
         path=("news-commentary-v10.{src}-en.{src}", "news-commentary-v10.{src}-en.en"),
     ),