fix: incorrectly calculates next semantic version with large commit bodies containing possible keywords

[ga-paul-t]

closes #359

[codecov-commenter]

Codecov Report

Merging #371 (d51a1ff) into main (309fd5c) will decrease coverage by 0.28%.
The diff coverage is 73.91%.

❗ Your organization is not using the GitHub App Integration. As a result you may experience degraded service beginning May 15th. Please install the Github App Integration for your organization. Read more.

@@            Coverage Diff             @@
##             main     #371      +/-   ##
==========================================
- Coverage   80.69%   80.42%   -0.28%     
==========================================
  Files          40       40              
  Lines        1865     1900      +35     
==========================================
+ Hits         1505     1528      +23     
- Misses        268      277       +9     
- Partials       92       95       +3     

Files Changed	Coverage Δ
internal/semver/parser.go	73.91% <73.33%> (-26.09%)	⬇️
internal/task/nextsemver/nextsemver.go	88.34% <100.00%> (ø)