adjust title format

Author: laqieer

README.md

@@ -1,13 +1,13 @@
-[GBA Graphics Editor](https://serenesforest.net/forums/index.php?/topic/26913-nintenlords-hacking-utilities/)
+# [GBA Graphics Editor](https://serenesforest.net/forums/index.php?/topic/26913-nintenlords-hacking-utilities/)
 
-# History
+## History
 
-## [V 2.2](https://www.dropbox.com/s/bc335ryiavgp123/GBA%20Graphics%20Editor.zip?dl=0)
+### [V 2.2](https://www.dropbox.com/s/bc335ryiavgp123/GBA%20Graphics%20Editor.zip?dl=0)
 Newest official version. Read README.txt for more information.
 
-## V 2.3
+### V 2.3
 Added support to read image using Fire Emblem specific format TSA with a header. Tick "With Head" box to use it.
 
-# Preview
+## Preview
 ![unticked](https://raw.githubusercontent.com/laqieer/GBA_Graphics_Editor/master/img/Plain_TSA.PNG)
 ![ticked](https://raw.githubusercontent.com/laqieer/GBA_Graphics_Editor/master/img/TSA_with_Header.PNG)