Update Groupie to 2.9.0

Author: TacoTheDank

app/src/main/java/org/schabi/newpipe/local/feed/FeedFragment.kt

@@ -47,7 +47,7 @@ import androidx.lifecycle.ViewModelProvider
 import androidx.preference.PreferenceManager
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.RecyclerView
-import com.xwray.groupie.GroupAdapter
+import com.xwray.groupie.GroupieAdapter
 import com.xwray.groupie.Item
 import com.xwray.groupie.OnAsyncUpdateListener
 import com.xwray.groupie.OnItemClickListener