certificates: add Arduino LLC US root certificate

Author: pennam

certificates/cacrt_all.pem

@@ -3532,3 +3532,18 @@ dVwPaFsdZcJfMw8eD/A7hvWwTruc9+olBdytoptLFwG+Qt81IR2tq670v64fG9PiO/yzcnMcmyiQ
 iRM9HcEARwmWmjgb3bHPDcK0RPOWlc4yOo80nOAXx17Org3bhzjlP1v9mxnhMUF6cKojawHhRUzN
 lM47ni3niAIi9G7oyOzWPPO5std3eqx7
 -----END CERTIFICATE-----
+
+Arduino LLC US (ArduinoCloud)
+==================================
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----