Fix small typos in README

[alexmart]

This pull request

• fixes small typos in the README file

[codecov]

Codecov Report

Merging #804 (288b4c3) into main (a876de5) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #804   +/-   ##
=========================================
  Coverage     98.93%   98.93%           
  Complexity      105      105           
=========================================
  Files            25       25           
  Lines           283      283           
=========================================
  Hits            280      280           
  Misses            3        3           

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[localheinz]

Thank you, @alexmart!