ci: update Rust build to 1.89

[coryan]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.16%. Comparing base (d22245f) to head (b6583ad).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2908      +/-   ##
==========================================
+ Coverage   94.86%   96.16%   +1.30%     
==========================================
  Files         105      105              
  Lines        4339     4384      +45     
==========================================
+ Hits         4116     4216     +100     
+ Misses        223      168      -55     

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