Fix typo in README

[datawookie]

No description provided.

[codecov]

Codecov Report

Merging #274 (05aad78) into master (ba6d747) will increase coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #274      +/-   ##
==========================================
+ Coverage   93.39%   93.54%   +0.15%     
==========================================
  Files           9        9              
  Lines         575      589      +14     
  Branches      117      117              
==========================================
+ Hits          537      551      +14     
  Misses         16       16              
  Partials       22       22              

Impacted Files	Coverage Δ
scrapy_splash/middleware.py	89.51% <0.00%> (+0.20%)	⬆️
scrapy_splash/response.py	94.33% <0.00%> (+0.28%)	⬆️
scrapy_splash/request.py	94.82% <0.00%> (+0.38%)	⬆️

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[Gallaecio]

Thanks!