fix another include directive for spatialindex

Author: xzcvczx

src/analysis/network/qgsvectorlayerdirector.cpp

@@ -32,7 +32,7 @@
 #include <QString>
 #include <QtAlgorithms>
 
-#include "SpatialIndex.h"
+#include <spatialindex/SpatialIndex.h>
 
 using namespace SpatialIndex;