fix Matrix3 docs typo

docs/api/en/math/Matrix3.html

@@ -159,7 +159,7 @@ zAxis = (c, f, i)
 		<p>Pre-multiplies this matrix by [page:Matrix3 m].</p>
 
 		<h3>[method:this setFromMatrix4]( [param:Matrix4 m] )</h3>
-		<p>Set this matrx to the upper 3x3 matrix of the Matrix4 [page:Matrix4 m].</p>
+		<p>Set this matrix to the upper 3x3 matrix of the Matrix4 [page:Matrix4 m].</p>
 
 		<h3>[method:this setUvTransform]( [param:Float tx], [param:Float ty], [param:Float sx], [param:Float sy], [param:Float rotation], [param:Float cx], [param:Float cy] )</h3>
 		<p>