Remove extra ` in README.md

[singularitti]

No description provided.

[codecov-commenter]

Codecov Report

Merging #962 (85c363a) into master (e3e3008) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #962   +/-   ##
=======================================
  Coverage   68.33%   68.33%           
=======================================
  Files          20       20           
  Lines        2018     2018           
=======================================
  Hits         1379     1379           
  Misses        639      639           

Flag	Coverage Δ
unittests	68.33% <ø> (ø)

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