use cudnn7

Author: jackalcooper

.github/workflows/build.yml

@@ -41,7 +41,7 @@ jobs:
           - tag-suffix: "cuda10.2"
             policy: "manylinux2014"
             platform: "x86_64"
-            CUDA_BASE_IMAGE: "nvidia/cuda:10.2-cudnn8-devel-centos7"
+            CUDA_BASE_IMAGE: "nvidia/cuda:10.2-cudnn7-devel-centos7"
 
     env:
       POLICY: ${{ matrix.policy }}