update version in src/aks-preview/setup.py to align with azure-cli-extensions/src/aks-preview/HISTORY.rst

Author: saewoni

src/aks-preview/setup.py

@@ -9,7 +9,7 @@
 
 from setuptools import find_packages, setup
 
-VERSION = "18.0.0b42"
+VERSION = "18.0.0b43"
 
 CLASSIFIERS = [
     "Development Status :: 4 - Beta",