Update arduinojson to v7.2.1 (#5812)

packages/a/arduinojson/xmake.lua

@@ -7,6 +7,7 @@ package("arduinojson")
     add_urls("https://github.com/bblanchon/ArduinoJson/archive/refs/tags/$(version).tar.gz",
              "https://github.com/bblanchon/ArduinoJson.git")
 
+    add_versions("v7.2.1", "2780504927533d64cf4256c57de51412b835b327ef4018c38d862b0664d36d4f")
     add_versions("v7.2.0", "d20aefd14f12bd907c6851d1dfad173e4fcd2d993841fa8c91a1d8ab5a71188b")
     add_versions("v7.1.0", "74bc745527a274bcab85c6498de77da749627113c4921ccbcaf83daa7ac35dee")
     add_versions("v7.0.4", "98ca14d98e9f1e8978ce5ad3ca0eeda3d22419d17586c60f299f369078929917")