Update optional from master

boost-commitbot · boost-commitbot · commit fd0a6211913b · 2026-01-31T22:03:47.000Z
diff --git a/libs/optional b/libs/optional
@@ -1 +1 @@
-Subproject commit 121f3efde91de78ca018019904732f55d33b5788
+Subproject commit 881bf8da26fedad0401d9b30556a2a67631896fc
