Use latest WiFiNina from git instead of latest released version

Author: aentinger

.github/workflows/compile-examples.yml

@@ -59,6 +59,7 @@ jobs:
               - name: RTCZero
               - name: WiFi101
               - name: WiFiNINA
+              - source-url: https://github.com/arduino-libraries/WiFiNINA.git
               - name: Arduino_MKRMEM
             sketch-paths: '"examples/utility/Provisioning"'
           # LoRaWAN boards