Swap direction of edges in update_functions_to_interaction_graph

[ReubenJ]

Currently, the edges of the graph structure stored in the dynamical system were swapped. This PR tests for the correct direction and fix the problem.

There is no related issue.

Checklist

• I am following the contributing guidelines
• Tests are passing
• Lint workflow is passing
• Docs were updated and workflow is passing

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.40%. Comparing base (6d17ee5) to head (d77476f).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #43   +/-   ##
=======================================
  Coverage   98.40%   98.40%           
=======================================
  Files           3        3           
  Lines         251      251           
=======================================
  Hits          247      247           
  Misses          4        4           

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