fix: update documentation commit parser regex to support plural form

Author: LabEG

cliff.toml

@@ -58,7 +58,7 @@ commit_preprocessors = [
 commit_parsers = [
   { message = "^feat", group = "<!-- 0 -->🚀 Features" },
   { message = "^fix", group = "<!-- 1 -->🐛 Bug Fixes" },
-  { message = "^doc", group = "<!-- 3 -->📚 Documentation" },
+  { message = "^docs?", group = "<!-- 3 -->📚 Documentation" },
   { message = "^perf", group = "<!-- 4 -->⚡ Performance" },
   { message = "^refactor", group = "<!-- 2 -->🚜 Refactor" },
   { message = "^style", group = "<!-- 5 -->🎨 Styling" },