b9554: [SYCL] Update compute runtime version to 26.x in docker (#24070)

This release updates the compute runtime version to 26.x within a Docker configuration for SYCL (Syclon Compute Language) support in llama.cpp. The change, addressed in pull request #24070, modernizes the build environment dependencies for SYCL-based GPU acceleration. This update likely improves compatibility and performance with newer Intel GPU compute drivers and runtime libraries.

Source: llama.cpp Releases | 2026-06-08