Fix skipped library entries and size warning notifications using same ID

(cherry picked from commit 91ed3a4a5facaaa335d4408e7c5342dcca430f47)

app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt

@@ -30,7 +30,7 @@ object Notifications {
     const val CHANNEL_LIBRARY_ERROR = "library_errors_channel"
     const val ID_LIBRARY_ERROR = -102
     const val CHANNEL_LIBRARY_SKIPPED = "library_skipped_channel"
-    const val ID_LIBRARY_SKIPPED = -103
+    const val ID_LIBRARY_SKIPPED = -104
 
     /**
      * Notification channel and ids used by the downloader.