docs(sdk): updated bitmap text docs

Author: CGjupoulton

playground/graphics/graphics-text.md

@@ -35,5 +35,5 @@ graphicEntityModule.createBitmapText()
 ![Example](resources/text-2.png)
 
 Extra tips :
-- A little help to turn fonts into bitmap fonts : http://kvazars.com/littera/
+- A tool to turn fonts into bitmap fonts : https://github.com/andryblack/fontbuilder (export in Sparrow format)
 - You can put your font in a sub folder of the assets repository whithout modifying any code

playground/misc/misc-3-release-notes.md

@@ -11,6 +11,7 @@ The CodinGame SDK is regularly updated and improved. This document lets you know
 ### 📝 Refactoring
 
 - Removed unused code
+- Removed link to littera tool from docs
 
 ## 4.0.2