⬆️ Update antirez/ds4

Signed-off-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: mudler

backend/cpp/ds4/Makefile

@@ -1,10 +1,10 @@
 # ds4 backend Makefile.
 #
-# Upstream pin lives below as DS4_VERSION?=512d07cb08f234b704b5a5959aa9e2d4c466eeb0
+# Upstream pin lives below as DS4_VERSION?=91bafb5acd5a6cf00b1e55ef68bf40ddd207bee7
 # (.github/bump_deps.sh) can find and update it - matches the
 # llama-cpp / ik-llama-cpp / turboquant convention.
 
-DS4_VERSION?=512d07cb08f234b704b5a5959aa9e2d4c466eeb0
+DS4_VERSION?=91bafb5acd5a6cf00b1e55ef68bf40ddd207bee7
 DS4_REPO?=https://github.com/antirez/ds4
 
 CURRENT_MAKEFILE_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))