Update signals2 from master

boost-commitbot · boost-commitbot · commit 19cd6fe2e0da · 2025-09-22T14:37:07.000Z
diff --git a/libs/signals2 b/libs/signals2
@@ -1 +1 @@
-Subproject commit fac4af47c89e8c625034824b6e69432fdab10258
+Subproject commit 3e7413b9d6084a160db9a2a90bb74d55415c5226
