Update Project.toml

Author: Anton Oresten

lib/cudnn/Project.toml

@@ -11,7 +11,7 @@ CUDA_Runtime_Discovery = "1af6417a-86b4-443c-805f-a4643ffb695f"
 CUDNN_jll = "62b44479-cb7b-5706-934f-f13b2eb2e645"
 
 [compat]
-BFloat16s = "0.6.0"
+BFloat16s = "0.5, 0.6"
 CEnum = "0.2, 0.3, 0.4, 0.5"
 CUDA = "~5.9"
 CUDA_Runtime_Discovery = "0.2, 0.3, 1"