fix Github actions

Summary: Pull Request resolved: facebookresearch#5274

Differential Revision: D56911192

Author: Yanghan Wang

.github/workflows/workflow.yml

@@ -37,14 +37,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        torch: ["1.8", "1.9", "1.10"]
+        torch: ["1.8.1", "1.9", "1.10"]
         include:
-          - torch: "1.8"
+          - torch: "1.8.1"
             torchvision: 0.9
           - torch: "1.9"
             torchvision: "0.10"
           - torch: "1.10"
-            torchvision: "0.11.1"
+            torchvision: "0.11.2"
     env:
       # point datasets to ~/.torch so it's cached by CI
       DETECTRON2_DATASETS: ~/.torch/datasets