Add vnightly-16.4.0-b81557b to previous-releases.txt

fullofcaffeine · fullofcaffeine · commit dbeb62310644 · 2023-08-14T00:14:44.000Z
diff --git a/previous-releases.txt b/previous-releases.txt
@@ -46,3 +46,4 @@ vnightly-16.4.0-054344c
 vnightly-16.4.0-042cf89
 vnightly-16.4.0-73eca1d
 vnightly-16.4.0-9394581
+vnightly-16.4.0-b81557b
