Gadgetbridge/app/src/main/res/xml/devicesettings_pairingkey_explanation.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.preference.PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <Preference
        android:icon="@drawable/ic_open_in_browser"
        android:persistent="false"
        android:key="authkey_explanation"
        android:summary="@string/pref_explanation_authkey" >
        <intent
            android:action="android.intent.action.VIEW"
            android:data="https://gadgetbridge.org/basics/pairing/"
            />
    </Preference>

</androidx.preference.PreferenceScreen>