fix: extra spaces in contributors and breaking changes

[maciej-ka]

🔗 Linked issue

#122

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Remove extra space in contributors title and breaking changes.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #134 (5844d67) into main (d76c9d9) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #134   +/-   ##
=======================================
  Coverage   68.63%   68.63%           
=======================================
  Files           9        9           
  Lines         880      880           
  Branches       81       81           
=======================================
  Hits          604      604           
  Misses        276      276           

Files Changed	Coverage Δ
src/markdown.ts	97.19% <100.00%> (ø)

[pi0]

Thanks!