feat: Add nanobind to PyModules requirements
References
Description
- Add nanobind v2.1.0 to
requirements.txt.in
. - File was renamed from 'requirements.txt' to 'requirements.txt.in' in aecb92df, so update the file name in the README.
- The valid Python package index is in the atlas-software-dist-eos/externals/PyModules/repo directory on EOS as this is a valid --index-url for 'pip install'.