RIOT: update for 2021.01

jia200x · jia200x · commit 3a89f2d03f2c · 2021-02-04T17:02:27.000+01:00
diff --git a/RIOT b/RIOT
@@ -1 +1 @@
-Subproject commit 8292037bfe95a9669d91a356bee0c989480688c1
+Subproject commit 6dc47da5032e59e4290b891960c93c6ee8c0cd20
