Amended the corresponding test

Author: Bas-Jan 't Jong

tests/PhpWord/Tests/Shared/DrawingTest.php

@@ -44,7 +44,7 @@ public function testUnitConversions()
             $this->assertEquals(round($value / 9525), $result);
 
             $result = Drawing::pixelsToPoints($value);
-            $this->assertEquals($value * 0.67777777, $result);
+            $this->assertEquals($value * 0.75, $result);
 
             $result = Drawing::pointsToPixels($value);
             $this->assertEquals($value * 1.333333333, $result);