llama.cpp b9851 release fixes CUDA integer truncation and provides binaries

The llama.cpp project has released version b9851, which includes a fix for CUDA to prevent integer truncation and overflow errors in the flash_attn_mask_to_KV_max kernel. This update addresses issues related to KQ mask strides within the specified kernel.

• macOS Apple Silicon (arm64) binaries are available, while KleidiAI support is disabled.
• Linux builds cover Ubuntu x64 and arm64 for CPU, Vulkan, ROCm 7.2, OpenVINO, and SYCL FP32/FP16.
• Android arm64 (CPU) binaries are provided for mobile devices.
• Windows releases include CPU, OpenCL Adreno, CUDA 12/13, Vulkan, OpenVINO, SYCL, and HIP variants.
• openEuler builds for x86 and aarch64 architectures are listed, with some configurations disabled.
• A standalone UI binary is also included in the release assets.

This release ensures stability for CUDA users by correcting calculation errors and provides comprehensive pre-built binaries across major operating systems and hardware accelerators.