Update version of Python to 3.8 in the prerequisites (#93399)
With support of Python 3.7 being deprecated, updating the prerequisites to list Python 3.8 or later.
Fixes #93256
Pull Request resolved: https://github.com/pytorch/pytorch/pull/93399
Approved by: https://github.com/atalman, https://github.com/Skylion007
Author
Svetlana Karslioglu
