Updated changelog

README.md

@@ -37,6 +37,7 @@ Changelog
     * Changed the 10% of the grade (previously only for time management) to also account for code design to reward thoughtful planning.
     * Improved the skeleton compiler to be more advanced by integrating lexer and parser to hopefully jump-start progress and avoid unnecessary debugging.
     * Covered assembler directives in more details by showcasing the meaning behind an example assembly program, because that topic had always caused confusion in the past years.
+    * Added an improved testing script written in Python.
 
 * New for 2022/2023: