Yes, you are right. The provided link seems to depend on the default CUDA runtime, i.e. CUDA 10.2.
Based on this PR it seems that torchaudio isn’t directly linking to this runtime, but depends on torch to provide all symbols.
In that case, you could check the corresponding torch.version.cuda output, as I cannot find an internal torchaudio flag which would indicate the needed CUDA runtime version.
The 1.11.0.dev... version is used in the nightly binaries, which you can also select via the install instructions.