Revert "replace Substratum with Bucket (LibreSubstratum)"

This reverts commit f16e975805.

doc/Applications.md

@@ -11,7 +11,6 @@ Full list of provided applications
 * Amaze (File Manager) [> F-Droid](https://f-droid.org/packages/com.amaze.filemanager)
 * AnySoftKeyboard [> F-Droid](https://f-droid.org//packages/com.menny.android.anysoftkeyboard)
 * BeHe Keybarod [> F-Droid](https://f-droid.org/packages/com.vlath.keyboard/)
-* Bucket [> F-Droid](https://f-droid.org/en/packages/com.jereksel.libresubstratum/)
 * (Simple) Calendar [> F-Droid](https://f-droid.org/packages/com.simplemobiletools.calendar)
 * Face Slim (Facebook client) [> F-Droid](https://f-droid.org/packages/org.indywidualni.fblite)
 * (Simple) Gallery [> F-Droid](https://f-droid.org/packages/com.simplemobiletools.gallery)
@@ -32,6 +31,7 @@ Full list of provided applications
 * Orbot [> Guardian Project](https://guardianproject.info/apps/orbot/)
 * Orfox [> Guardian Project](https://guardianproject.info/apps/orfox/)
 * QKSMS [> F-Droid](https://f-droid.org/packages/com.moez.QKSMS)
+* Substratum (App) [> GitHub](https://github.com/substratum/substratum)
 * Termux [> F-Droid](https://f-droid.org/packages/com.termux)
 * Twidere (Twitter client) [> F-Droid](https://f-droid.org/packages/org.mariotaku.twidere)
 * XDA Labs [> XDA](https://forum.xda-developers.com/android/apps-games/labs-t3241866)