Update README.rst.

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[codecov]

Codecov Report

Merging #23 (d5ebf54) into main (a29a7f4) will not change coverage.
The diff coverage is n/a.

❗ Current head d5ebf54 differs from pull request most recent head fb4deb5. Consider uploading reports for the commit fb4deb5 to get more accurate results

@@           Coverage Diff           @@
##             main      #23   +/-   ##
=======================================
  Coverage   99.21%   99.21%           
=======================================
  Files          14       14           
  Lines         510      510           
=======================================
  Hits          506      506           
  Misses          4        4           

Flag	Coverage Δ
end_to_end	88.43% <ø> (ø)
unit	66.47% <ø> (ø)

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