correct spelling mistakes

[EdwardBetts]

No description provided.

[codecov]

Codecov Report

Merging #90 into master will decrease coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #90      +/-   ##
==========================================
- Coverage   88.45%   88.42%   -0.03%     
==========================================
  Files           2        2              
  Lines         840      838       -2     
  Branches      168      168              
==========================================
- Hits          743      741       -2     
  Misses         58       58              
  Partials       39       39

Impacted Files	Coverage Δ
src/gitchangelog/gitchangelog.py	88.31% <100%> (-0.03%)	⬇️

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