Fix typo in benchmark documentation

[ishasinghrathore37]

This PR fixes a minor typo in the benchmark documentation (" depedencies-> dependencies") to improve clarity and correctness.

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📚 Documentation preview 📚: https://mdanalysis--5258.org.readthedocs.build/en/5258/

[github-actions]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.82%. Comparing base (900d20b) to head (0a27378).
⚠️ Report is 7 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5258      +/-   ##
===========================================
- Coverage    93.83%   93.82%   -0.01%     
===========================================
  Files          180      180              
  Lines        22473    22473              
  Branches      3189     3189              
===========================================
- Hits         21088    21086       -2     
- Misses         923      924       +1     
- Partials       462      463       +1     

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[orbeckst]

Please restore the standard PR comment that includes the AI disclosure and full checklist. We will not review PRs with incomplete information.