Minor fix

Author: MarcoLicci

app/src/main/res/layout/participant_list_fragment.xml

@@ -2,7 +2,7 @@
 <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/placesRecycler"
+    android:id="@+id/recycler"
     android:name="it.unimib.pickapp.ui.ParticipantListFragment"
     android:layout_width="match_parent"
     android:layout_height="match_parent"

app/src/main/res/layout/place_selection_fragment.xml

@@ -2,7 +2,7 @@
 <androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:id="@+id/recycler"
+    android:id="@+id/placesRecycler"
     android:name="it.unimib.pickapp.ui.FPlaceSelectionFragment"
     android:layout_width="match_parent"
     android:layout_height="match_parent"