sync: bump moxygen to 3ff89af (restore passive-subscriber guard in beginSubgroup)

gmarzot · gmarzot · commit 457a53c5bac1 · 2026-07-22T14:23:16.000-04:00
diff --git a/deps/moxygen b/deps/moxygen
@@ -1 +1 @@
-Subproject commit 0d9f3af9875c20be4e7437262358c49816020594
+Subproject commit 3ff89aff070ff97894ebd389179de4d80e9fb4d1
