Rename .devcontainers for CUDA 12.5 (#224)

Follow up to PR: #219
Partially addresses issue: rapidsai/build-planning#73

Renames the `.devcontainer`s for CUDA 12.5

cc @KyleFromNVIDIA @jameslamb @trxcllnt (for awareness)

Authors:
  - https://github.com/jakirkham

Approvers:
  - Paul Taylor (https://github.com/trxcllnt)
  - James Lamb (https://github.com/jameslamb)

URL: #224

Author: jakirkham