fix(commands/init): fix toml config format error

[Lee-W]

Description

fix(commands/init): fix toml config format error

Checklist

• Add test cases to all the changes you introduce
• Run ./script/format and ./script/test locally to ensure this change passes linter check and test
• Test the changes on the local machine manually
• Update the documentation for the changes

Expected behavior

Run cz init without encountering error

Steps to Test This Pull Request

1. Run cz init with this pyproject.toml

Additional context

#367

[codecov]

Codecov Report

Merging #369 (b8bc952) into master (8902b40) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #369      +/-   ##
==========================================
+ Coverage   97.56%   97.59%   +0.03%     
==========================================
  Files          39       39              
  Lines        1356     1373      +17     
==========================================
+ Hits         1323     1340      +17     
  Misses         33       33              

Flag	Coverage Δ
unittests	97.59% <100.00%> (+0.03%)	⬆️

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Impacted Files	Coverage Δ
commitizen/__version__.py	100.00% <100.00%> (ø)
commitizen/bump.py	100.00% <100.00%> (ø)
commitizen/config/toml_config.py	100.00% <100.00%> (ø)

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