Update config.yml (#2226)

Temporarily installing pytorch v1.9.1 manually instead of using pre-built docker image (not yet available).

.circleci/config.yml

@@ -95,6 +95,10 @@ run_pytorch_container: &run_pytorch_container
         docker run --gpus=all --rm -itd --shm-size 16G -v ${wd}:/ignite -w /ignite --name pthd << pipeline.parameters.pytorch_stable_image >>
         docker exec -it pthd nvidia-smi
         docker exec -it pthd ls
+        # temporarily manually install v1.9.1
+        # https://github.com/pytorch/ignite/pull/2211#issuecomment-927080841
+        export update_pth_cmd='conda install -y pytorch==1.9.1 -c pytorch -c nvidia'
+        docker exec -it pthd /bin/bash -c "$update_pth_cmd"
 
 run_pytorch_devel_container: &run_pytorch_devel_container
   - run:
@@ -105,6 +109,10 @@ run_pytorch_devel_container: &run_pytorch_devel_container
         docker run --gpus=all --rm -itd --shm-size 16G -v ${wd}:/ignite -w /ignite --name pthd << pipeline.parameters.pytorch_stable_image_devel >>
         docker exec -it pthd nvidia-smi
         docker exec -it pthd ls
+        # temporarily manually install v1.9.1
+        # https://github.com/pytorch/ignite/pull/2211#issuecomment-927080841
+        export update_pth_cmd='conda install -y pytorch==1.9.1 -c pytorch -c nvidia'
+        docker exec -it pthd /bin/bash -c "$update_pth_cmd"
 
 install_dependencies: &install_dependencies
   - run: