Add callout about redesign

Author: chennesy

index.md

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 permalink: index.html
 site: sandpaper::sandpaper_site
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+::::::::::::::::::::::::::::::::::::::::::  callout
+## Major lesson update in early 2024 
+The Python Intro for Libraries lesson is currently begin redeveloped. The new Python lesson will feature a different dataset (of library usage data) and will use JupyterLab (instead of Spyder). Due to the scope of changes, the lesson is being updated (in a separate GitHub repository)[https://github.com/chennesy/lc-python-intro]. Once the redesign is finished that lesson will replace the lesson maintained here. We will post a target date for the change here as soon as we have a clear timeline, but if you are planning to teach this lesson in early 2024 (please add an issue here)[https://github.com/LibraryCarpentry/lc-python-intro/issues] to let us know.
+::::::::::::::::::::::::::::::::::::::::::::::::::
 
 This lesson is an introduction to programming in Python
 for librarians with little or no previous programming experience.