Update conf.py

Author: jmbhughes

docs/source/conf.py

@@ -14,7 +14,7 @@
 project = "regularizepsf"
 copyright = "2023, J. Marcus Hughes and the PUNCH Science Operations Center"
 author = "J. Marcus Hughes and the PUNCH Science Operations Center"
-release = "0.3.2"
+release = "0.4.0"
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration