build(rust): Fix a feature gate for lz4 compression in polars-parquet

[ozgrakkurt]

Feature check for inner_compress function has a typo for "lz4" and this is causing a compilation error if only "lz4" feature is enabled.

[codspeed-hq]

CodSpeed Performance Report

Merging #15565 will degrade performances by 12.11%

_{Comparing ozgrakkurt:patch-1 (86ce2a0) with main (b91dedb)}

Summary

❌ 1 regressions
✅ 21 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	ozgrakkurt:patch-1	Change
❌	test_sort_nan_1942	1 ms	1.2 ms	-12.11%

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.16%. Comparing base (b91dedb) to head (86ce2a0).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15565   +/-   ##
=======================================
  Coverage   81.15%   81.16%           
=======================================
  Files        1367     1367           
  Lines      175313   175313           
  Branches     2530     2530           
=======================================
+ Hits       142282   142290    +8     
+ Misses      32555    32548    -7     
+ Partials      476      475    -1     

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[stinodego]

Thanks for the fix!