udpate changelog

Author: mmarchetti

CHANGELOG.md

@@ -20,6 +20,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   and `*_app.py` are now considered. However, if the directory contains more than
   one file matching these new patterns, you must provide rsconnect-python with an
   explicit `--entrypoint` argument.
+- Added a new verbose logging level. Specifying `-v` on the command line uses this
+  new level. Currently this will cause filenames to be logged as they are added to
+  a bundle. To enable maximum verbosity (debug level), use `-vv`.
 
 ## [1.20.0] - 2023-09-11