Update android release code.

Author: Alzter

SourceCode/export_presets.cfg

@@ -207,7 +207,7 @@ keystore/release="C:/Users/Alex/SuperTux-Classic/SourceCode/android/supertuxclas
 keystore/release_user="supertuxclassic"
 keystore/release_password="supertuxclassic"
 one_click_deploy/clear_previous_install=false
-version/code=3
+version/code=4
 version/name="0.3.4"
 package/unique_name="org.godotengine.supertuxclassic"
 package/name="SuperTux Classic"