chore: bump upstream gstack to 7911b7b

Ahacad · github-actions[bot] · commit aacaa2dd50e4 · 2026-03-30T10:07:16.000Z
diff --git a/vendor/gstack b/vendor/gstack
@@ -1 +1 @@
-Subproject commit c86faa7968688993406fd4c6cd9550d58306408f
+Subproject commit 7911b7b974a1cef2794473a77ea93d0ac351b8c2
