Follow-up: Fix accents support in x-remote-user-name

[leovalais]

solves #9986 (comment)

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.10%. Comparing base (f354aff) to head (ac741f6).
Report is 3 commits behind head on dev.

Files with missing lines	Patch %	Lines
editoast/src/views/mod.rs	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##              dev   #10013      +/-   ##
==========================================
- Coverage   80.11%   80.10%   -0.02%     
==========================================
  Files        1048     1048              
  Lines      105250   105250              
  Branches      756      756              
==========================================
- Hits        84326    84307      -19     
- Misses      20883    20902      +19     
  Partials       41       41              

Flag	Coverage Δ
editoast	74.20% <0.00%> (-0.07%)	⬇️
front	89.36% <ø> (ø)
gateway	2.18% <ø> (ø)
osrdyne	3.28% <ø> (ø)
railjson_generator	87.50% <ø> (ø)
tests	87.00% <ø> (ø)

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[flomonster]

LGTM