Update path for genome loader in README

[crockettz]

Fix broken path

Description of PR purpose/changes

• Please include a summary of the change and which issue is fixed.
• Please also include relevant motivation and context.
• List any dependencies that are required for this change.

Testing Instructions

• Details for how to test the PR:

• Tests pass locally and in GitHub Actions

Dev Checklist:

• My code follows the guidelines at https://sites.google.com/lbl.gov/trussresources/home?authuser=0
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have run Ruff format to format my code
• I have run Ruff check and fixed any errors that it uncovered
• Any dependent changes have been merged and published in downstream modules

Updating Version and Release Notes (if applicable)

• Version has been bumped for each release.
• README has been updated for each release.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 52.69%. Comparing base (e6b3b2f) to head (6c54858).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop      #85   +/-   ##
========================================
  Coverage    52.69%   52.69%           
========================================
  Files           63       63           
  Lines         3241     3241           
========================================
  Hits          1708     1708           
  Misses        1533     1533           

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