Add .webp to link extractor IGNORED_EXTENSIONS list

[dveselov]

No description provided.

[codecov]

Codecov Report

Merging #6021 (529eb9a) into master (3318971) will increase coverage by 0.06%.
The diff coverage is n/a.

❗ Current head 529eb9a differs from pull request most recent head 7355741. Consider uploading reports for the commit 7355741 to get more accurate results

@@            Coverage Diff             @@
##           master    #6021      +/-   ##
==========================================
+ Coverage   88.85%   88.92%   +0.06%     
==========================================
  Files         162      162              
  Lines       11445    11445              
  Branches     1861     1861              
==========================================
+ Hits        10170    10178       +8     
+ Misses        968      962       -6     
+ Partials      307      305       -2     

Files Changed	Coverage Δ
scrapy/linkextractors/__init__.py	100.00% <ø> (ø)

... and 1 file with indirect coverage changes

[wRAR]

Thanks!