Add radio troubleshooting step to upgrade npcap (#1698)

Author: sciencewhiz

source/docs/zero-to-robot/step-3/radio-programming.rst

@@ -211,4 +211,5 @@ Troubleshooting
 - Plug directly from your computer into the wireless bridge and make sure no other devices are connected to your computer via ethernet.
 - Ensure the ethernet is plugged into the port closest to the power jack on the wireless bridge.
 - If using a foreign language Operating System, try using an English OS, such as on the KOP provided PC or setting the Locale setting to "en_us" as described on `this page <https://www.java.com/en/download/help/locale.xml>`_.
+- Some users have reported success after installing `npcap 1.60 <https://npcap.com/>`__. If this doesn't resolve the issue, it's recommended to uninstall npcap and the radio tool and then reinstall the radio tool in order to get back to a known configuration.
 - If all else fails, try a different computer.