Typo fix (#4356)

Seemed to be a typo. Hope this helps.

examples/textures/textures_image_drawing.c

@@ -47,7 +47,7 @@ int main(void)
 
     UnloadImage(cat);       // Unload image from RAM
 
-    // Load custom font for frawing on image
+    // Load custom font for drawing on image
     Font font = LoadFont("resources/custom_jupiter_crash.png");
 
     // Draw over image using custom font
@@ -93,4 +93,4 @@ int main(void)
     //--------------------------------------------------------------------------------------
 
     return 0;
-}
+}