pin pandas version - Githubissues

Description

Pinning pandas version for now to match data prep notebooks so SplitDatasets can be loaded properly by torchdms

Please describe the tests added to verify correct behavior.

[ ] The code uses informative and accurate variable and function names
[ ] The functionality is factored out into functions and methods with logical interfaces
[ ] Comments are up to date, document intent, and there are no commented-out code blocks
[ ] Commenting and/or documentation is sufficient for others to be able to understand intent and implementation
[ ] TODOs have been eliminated from the code
[ ] The corresponding issue number (e.g. #278) has been searched for in the code to find relevant notes
[ ] Documentation has been redeployed