Fix cuDNN compat (#2861)

cuDNN 9.12 doesn't work with CUDA 11.

Author: kshyatt

lib/cudnn/Project.toml

@@ -13,5 +13,5 @@ CUDNN_jll = "62b44479-cb7b-5706-934f-f13b2eb2e645"
 CEnum = "0.2, 0.3, 0.4, 0.5"
 CUDA = "~5.8"
 CUDA_Runtime_Discovery = "0.2, 0.3"
-CUDNN_jll = "9.10"
+CUDNN_jll = "=9.10"
 julia = "1.10"