Update README.md

Author: TechnoTanuki

README.md

@@ -2,7 +2,7 @@
 
 # Python_BMP
 A pure Python 2D/3D graphics library that outputs to windows bitmap format
-* Developed and tested using Python 3.8 and 3.10.4
+* Developed and tested using Python 3.8 / 3.10.4 / 3.11
 * No dependencies required
 
 # Instructions