fix(sdk): update javadoc links

Author: NaejDoree

README.md

@@ -8,4 +8,4 @@ This engine is meant to be imported with maven from a project such as [the Game
 
 Check the documentation on the [tech.io playground](https://www.codingame.com/playgrounds/25775).
 
-Check the [javadoc](https://codingame.github.io/codingame-sdk-doc/).
+Check the [javadoc](https://codingame.github.io/codingame-game-engine/).

playground/getting-started/tutorial-1-introduction.md

@@ -18,7 +18,7 @@ The entry point of the game is the class `SoloGameManager` or `MultiplayerGameMa
 
 # Resources
 
-- [Javadoc](https://codingame.github.io/codingame-sdk-doc/)
+- [Javadoc](https://codingame.github.io/codingame-game-engine/)
 - [SDK source](https://github.com/CodinGame/codingame-game-engine)
 - [Free to use graphical assets](https://github.com/CodinGame/codingame-sdk-assets)
 - [Game Skeleton](https://github.com/CodinGame/game-skeleton)