There is an updated pull request by ahesford against master on the void-packages repository

https://github.com/ahesford/void-packages opencl
https://github.com/void-linux/void-packages/pull/21393

opencl2-headers: bump version to agree with upstream numbering
This does not change the package content, but it realigns package versioning to be compatible with upstream and prevents false detection of package updates.

A patch file from https://github.com/void-linux/void-packages/pull/21393.patch is attached