llama.cpp v b11527 adds 2D WebGPU workgroups and new binaries

The ggml‑org team released llama.cpp version b11527 on 2026-10-09. The update switches all WebGPU operations to 2‑D workgroup dispatch, removing the older 1‑D method. It also bundles new pre‑compiled binaries for macOS (Apple Silicon and Intel), iOS, and several Ubuntu configurations, including Vulkan and CUDA builds. The changes are aimed at smoother GPU performance in browsers and easier setup on supported devices.