fix(sunburst): lift sunburst with higher z2 on emphasis

src/chart/sunburst/SunburstPiece.js

@@ -158,6 +158,8 @@ SunburstPieceProto.updateData = function (
 
     this._seriesModel = seriesModel || this._seriesModel;
     this._ecModel = ecModel || this._ecModel;
+
+    graphic.setHoverStyle(this);
 };
 
 SunburstPieceProto.onEmphasis = function (highlightPolicy) {