Fix index update of torchvision-extra-decoder (#6388)

Author: NicolasHug

s3_management/manage.py

@@ -184,7 +184,7 @@
     "torchtext",
     "torchtune",
     "torchvision",
-    "torchvision-extra-decoders",
+    "torchvision_extra_decoders",
     "triton",
     "tqdm",
     "typing_extensions",