chore: bump cudnn to 9.8 (#1345)

Author: avik-pal

deps/ReactantExtra/.bazelrc

@@ -19,8 +19,8 @@ build -c opt
 build:cuda --repo_env TF_NEED_CUDA=1
 build:cuda --repo_env TF_NVCC_CLANG=1
 build:cuda --repo_env TF_NCCL_USE_STUB=1
-build:cuda --repo_env=HERMETIC_CUDA_VERSION="12.6.2"
-build:cuda --repo_env=HERMETIC_CUDNN_VERSION="9.4.0"
+build:cuda --repo_env=HERMETIC_CUDA_VERSION="12.8.1"
+build:cuda --repo_env=HERMETIC_CUDNN_VERSION="9.8.0"
 # "sm" means we emit only cubin, which is forward compatible within a GPU generation.
 # "compute" means we emit both cubin and PTX, which is larger but also forward compatible to future GPU generations.
 build:cuda --repo_env HERMETIC_CUDA_COMPUTE_CAPABILITIES="sm_50,sm_60,sm_70,sm_80,compute_90"