Bump external/SPIRV-Headers from `8e2ad27` to `36d5e2d` · kpet/spirv2clc@d68a3d6

The job was canceled because "ubuntu-20_04_Debug" failed.

The operation was canceled.

Saving cache failed: Error: Path Validation Error: Path(s) specified in the action for caching do(es) not exist, hence no cache is being saved.