ports/rp2: Fix SparkFun XRP Controller Beta URL.

Signed-off-by: Dryw Wade <[email protected]>

Author: sfe-SparkFro

ports/rp2/boards/SPARKFUN_XRP_CONTROLLER_BETA/board.json

@@ -18,6 +18,6 @@
     "mcu": "rp2040",
     "product": "XRP Controller (Beta)",
     "thumbnail": "",
-    "url": "https://www.sparkfun.com/sparkfun-experiential-robotics-platform-xrp-controller.html",
+    "url": "https://www.sparkfun.com/sparkfun-experiential-robotics-platform-xrp-controller-beta.html",
     "vendor": "Sparkfun"
 }