rust polars 0.39.1

[ritchie46]

Had to update rustc to be able to release.

[codspeed-hq]

CodSpeed Performance Report

Merging #15676 will not alter performance

_{Comparing dev (ea35675) with main (1e7fa8e)}

Summary

✅ 22 untouched benchmarks

[codecov]

Codecov Report

Attention: Patch coverage is 90.90909% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 81.33%. Comparing base (1e7fa8e) to head (ea35675).
Report is 1 commits behind head on main.

Files	Patch %	Lines
...ates/polars-core/src/chunked_array/ops/bit_repr.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15676   +/-   ##
=======================================
  Coverage   81.33%   81.33%           
=======================================
  Files        1374     1374           
  Lines      176467   176471    +4     
  Branches     2544     2544           
=======================================
+ Hits       143522   143537   +15     
+ Misses      32463    32453   -10     
+ Partials      482      481    -1     

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