Set version scheme to semver

[Lee-W]

Since version 3.4.0, commitizen introduce version_schemes. By default, python project uses pep440 instead of semver (check here for more information). As we use "semver" in this project, I set the version_scheme to "semver" to fix a version bumping error

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (972beca) 98.59% compared to head (0642327) 98.59%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1202   +/-   ##
=======================================
  Coverage   98.59%   98.59%           
=======================================
  Files          90       90           
  Lines        5395     5395           
=======================================
  Hits         5319     5319           
  Misses         76       76           

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