Update README.md

[franciosi]

Small typo fixes

[codecov-io]

Codecov Report

Merging #2248 (90b1db5) into master (c0dae48) will decrease coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2248      +/-   ##
==========================================
- Coverage   63.30%   63.19%   -0.11%     
==========================================
  Files          30       30              
  Lines        1496     1497       +1     
==========================================
- Hits          947      946       -1     
- Misses        549      551       +2     

Impacted Files	Coverage Δ
lib/oxidized/output/git.rb	17.35% <0.00%> (-1.66%)	⬇️
lib/oxidized/node.rb	70.83% <0.00%> (+0.20%)	⬆️

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