Update CITATION.cff BibTeX metadata

[nawtrey]

The journal metadata was not available (here) so the current BibTeX entry is as follows:

@article{Awtrey_Kinetic_Diagram_Analysis_2024,
author = {Awtrey, Nikolaus Carl and Beckstein, Oliver},
doi = {10.1021/acs.jctc.4c00688},
journal = {Journal of Chemical Theory and Computation},
title = {{Kinetic Diagram Analysis: A Python Library for Calculating Steady-State Observables of Biochemical Systems Analytically}},
year = {2024}
}

When the other metadata becomes available it should be added so the entry is complete, e.g.,

  month: 8
  start: 1 # First page number
  end: 10 # Last page number
  issue: 1
  volume: 1

[nawtrey]

We also need to update the citation in the root README.md

[nawtrey]

The citation was updated yesterday, so this can be addressed any time:

J. Chem. Theory Comput. 2024, 20, 17, 7646–7666