chore: test: add xml work title for test_sorted_notes_chord_vexflow_keys_order

test/data/test_sorted_notes_chord_vexflow_keys_order.musicxml

@@ -2,7 +2,7 @@
 <!DOCTYPE score-partwise PUBLIC "-//Recordare//DTD MusicXML 3.1 Partwise//EN" "http://www.musicxml.org/dtds/partwise.dtd">
 <score-partwise version="3.1">
   <work>
-    <work-title></work-title>
+    <work-title>Test - Chord Accidentals Vexflow Keys Order</work-title>
   </work>
   <movement-title></movement-title>
   <!-- Test sample: sorted notes (chord) vexflow keys order).