typo: update README.md

[fedeci]

- recieves a string
+ receives a string

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)

[codecov]

Codecov Report

Merging #1640 (a2ad698) into master (63b6162) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master     #1640   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          100       100           
  Lines         1843      1843           
=========================================
  Hits          1843      1843           

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[tux-tn]

Nice catch @fedeci ! Thank you