Update gitignore list

[sapk]

fix #5257

The script https://github.com/go-gitea/gitea/blob/master/scripts/generate-gitignores.go need to be updated to handle link in the gitignore repo.

[codecov-io]

Codecov Report

Merging #5258 into master will increase coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5258      +/-   ##
==========================================
+ Coverage   37.61%   37.62%   +<.01%     
==========================================
  Files         310      310              
  Lines       46042    46042              
==========================================
+ Hits        17320    17322       +2     
+ Misses      26243    26241       -2     
  Partials     2479     2479

Impacted Files	Coverage Δ
models/repo_list.go	64.55% <0%> (+1.26%)	⬆️

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[sapk]

This PR is ready for review.
I updated the script https://github.com/go-gitea/gitea/pull/5258/files#diff-fd99876caac1c11beb1c52ab37fb58f7 to copy content of symlink (Clojure, Fortran, Kotlin) in the source tar (to be sure to be compatible with windows).