Update build.yml

Author: astonzhang

static/build.yml

@@ -5,10 +5,10 @@ dependencies:
     - ..  # d2l
     - git+https://github.com/d2l-ai/d2l-book
     - mxnet-cu101==1.7.0
-    - torch==1.8.0.dev20201220+cu101
+    - torch==1.8.0.dev20201225+cu101
     - --pre
     - -f https://download.pytorch.org/whl/nightly/cu101/torch_nightly.html
-    - torchvision==0.9.0.dev20201220+cu101
+    - torchvision==0.9.0.dev20201225+cu101
     - --pre
     - -f https://download.pytorch.org/whl/nightly/cu101/torch_nightly.html
     - tensorflow==2.3.1