Fix typos in README

[newsroomdev]

Purpose

Adds a missing word, "be", as well as "may" for parallelism

[codecov]

Codecov Report

Merging #337 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #337   +/-   ##
=======================================
  Coverage   98.54%   98.54%           
=======================================
  Files          33       33           
  Lines         619      619           
=======================================
  Hits          610      610           
  Misses          9        9

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[rumpl]

Thanks!