Sunsetting preparations

BVM will not be updated to target Android 15.
It will stay around until Google Play at some point no longer show it for newer devices.
Last release stays available on GitHub.

This change will likely break the app:
https://developer.android.com/about/versions/15/behavior-changes-15

app/src/main/res/xml/settings_about.xml

@@ -55,7 +55,7 @@
             android:title="@string/label_discord">
             <intent
                 android:action="android.intent.action.VIEW"
-                android:data="https://sdmaid.darken.eu/discord"/>
+                android:data="https://discord.gg/PZR7M8p" />
         </Preference>
     </PreferenceCategory>
     <PreferenceCategory android:title="@string/label_thanks">