update changelog

Author: Jannis-Mittenzwei

doc/changes/unreleased.md

@@ -1,6 +1,16 @@
 # Unreleased
 
-Verification of the Python and Exasol version format of the config by adding a BaseConfig class
+Verification of the Python and Exasol version format of the config by adding a BaseConfig class. To Use:
+    
+    #Use
+        Project_Config = BaseConfig()
+    #modify
+        Project_Config = BaseConfig(python_versions=["3.12"])
+    #expand
+        class ProjectConfig(BaseConfig):
+        extra_data: list[str] = ["data"]
+
+Project_Config = ProjectConfig()
 
 ## Feature