more around ws2812b

diff --git a/plug b/plug
index e0337b55907af998e8302c2e206228198024677d..21f9f3d2a5e0eb5627abf2eaede8f54f3beaab72 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit e0337b55907af998e8302c2e206228198024677d
+Subproject commit 21f9f3d2a5e0eb5627abf2eaede8f54f3beaab72