Commit 39bc9d0 for stable-diffusion.cpp

commit 39bc9d0b4bad86750fcb1fd2d711bc57a4c6018f
Author: leejet <leejet714@gmail.com>
Date:   Thu Oct 22 22:58:25 2026 +0800

    fix: update ggml to avoid small BAR heaps on Vulkan (#2181)

diff --git a/ggml b/ggml
index dc99877..c1f80e5 160000
--- a/ggml
+++ b/ggml
@@ -1 +1 @@
-Subproject commit dc998771e700d49bbdf9a39cede22bb5b3311767
+Subproject commit c1f80e507db1d0ce49f3bf7f81bc79246d7a2611