pixelsize, not fontsize

Author: rafaqz

README.md

@@ -18,9 +18,9 @@ img, metric = renderface(face, 'C')
 
 # render a string into an existing matrix
 myarray = zeros(UInt8, 100, 100)
-fontsize = 10
+pixelsize = 10
 x0, y0 = 90, 10
-renderstring!(myarray, "hello", face, fontsize, x0, y0, halign=:hright)
+renderstring!(myarray, "hello", face, pixelsize, x0, y0, halign=:hright)
 ```
 
 credits to @aaalexandrov from whom most of the early code comes.