ROCm upgraded to 7.2.1 in Linux builds

ROCm has been updated to version 7.2.1 across Linux build infrastructure. The change bumps the version in both the GitHub Actions CI workflow and the Docker build configuration, ensuring consistent builds use the latest ROCm release. According to the PR description, this release includes performance improvements and bug fixes. Linux-based GPU compute workloads using ROCm will benefit from these upstream changes on their next build run.