Switch CI to CUDA 11.7 from CUDA 11.6 (#3031)

Summary:
Remove cuda 11.6 from CI replace with 11.7
Following the Release readme here: https://github.com/pytorch/pytorch/blob/master/RELEASE.md#release-compatibility-matrix

Pull Request resolved: https://github.com/pytorch/audio/pull/3031

Reviewed By: mthrok

Differential Revision: D42937626

Pulled By: atalman

fbshipit-source-id: 7e01c56ec0eefbef9ad455d013fced9012febe82

.circleci/config.yml

@@ -657,7 +657,7 @@ jobs:
     resource_class: gpu.nvidia.medium
     environment:
       <<: *environment
-      CUDA_VERSION: 11.6
+      CUDA_VERSION: 11.7
       image_name: pytorch/torchaudio_unittest_base:manylinux-cuda10.2-cudnn8-20210623
     steps:
       - checkout
@@ -728,7 +728,7 @@ jobs:
       name: windows-gpu
     environment:
       <<: *environment
-      CUDA_VERSION: "11.6"
+      CUDA_VERSION: "11.7"
     steps:
       - checkout
       - designate_upload_channel

.circleci/config.yml.in

@@ -657,7 +657,7 @@ jobs:
     resource_class: gpu.nvidia.medium
     environment:
       <<: *environment
-      CUDA_VERSION: 11.6
+      CUDA_VERSION: 11.7
       image_name: pytorch/torchaudio_unittest_base:manylinux-cuda10.2-cudnn8-20210623
     steps:
       - checkout
@@ -728,7 +728,7 @@ jobs:
       name: windows-gpu
     environment:
       <<: *environment
-      CUDA_VERSION: "11.6"
+      CUDA_VERSION: "11.7"
     steps:
       - checkout
       - designate_upload_channel