Update size badge

Author: AnastaZIuk

.github/badges/master-payload-size.json

@@ -1,6 +1,6 @@
 {
   "schemaVersion": 1,
   "label": "master payload",
-  "message": "12.0 MiB",
+  "message": "12.1 MiB",
   "color": "yellow"
 }