Fix Stryd5 Indoor mode characteristic UUID

The mode-switch write was targeting 7e78aa18, which is the service
UUID, not a characteristic UUID - the service only exposes two
characteristics, 7e78aa20 (write, handle 33) and 7e78aa19 (notify,
handle 35), confirmed from Andrea's GATT discovery log. The write
never matched any characteristic, so the mode switch silently never
fired. Target 7e78aa20 instead.

Refs #4480

Author: cagnulein

src/devices/strydrunpowersensor/strydrunpowersensor.cpp

@@ -525,7 +525,7 @@ void strydrunpowersensor::characteristicChanged(const QLowEnergyCharacteristic &
             qDebug() << QStringLiteral("Current VerticalOscillationMM:") << VerticalOscillationMM.value();
         } else if (strydIndoorModeRequested && newValue.length() >= 3 && (uint8_t)newValue.at(0) == 0x15 &&
                    (uint8_t)newValue.at(1) == 0x00) {
-            // ack of the 15 00/15 01 mode switch written to 7e78aa18: byte 2 echoes back the confirmed
+            // ack of the 15 00/15 01 mode switch written to 7e78aa20: byte 2 echoes back the confirmed
             // mode (0x00 = Indoor, 0x01 = Outdoor)
             uint8_t confirmedMode = (uint8_t)newValue.at(2);
             if (confirmedMode == 0x00) {
@@ -620,7 +620,7 @@ void strydrunpowersensor::stateChanged(QLowEnergyService::ServiceState state) {
                 // formula. Switching the pod to Indoor mode makes it stop compensating for incline on its
                 // own, leaving QZ's formula as the only source of the incline adjustment.
                 if (bluetoothDevice.name().startsWith(QStringLiteral("Stryd5"), Qt::CaseInsensitive) &&
-                    c.uuid() == QBluetoothUuid(QStringLiteral("7e78aa18-72cd-d3b8-a81f-5b7e589bea0f")) &&
+                    c.uuid() == QBluetoothUuid(QStringLiteral("7e78aa20-72cd-d3b8-a81f-5b7e589bea0f")) &&
                     (c.properties() & QLowEnergyCharacteristic::Write)) {
                     strydIndoorModeService = s;
                     strydIndoorModeChar = c;