📝 Extend change log title meanings

This patch makes them more verbose so that they are clearer to the
readers.

pyproject.toml

@@ -373,50 +373,50 @@ template = "changelog/_template.rst"
 # When something public gets removed in a breaking way. Could be
 # deprecated in an earlier release.
 directory = "breaking"
-name = "Breaking Changes"
+name = "Removals and backward incompatible breaking changes"
 showcontent = true
 
 [[tool.towncrier.type]]
 # Declarations of future API removals and breaking changes in behavior.
 directory = "deprecation"
-name = "Deprecations"
+name = "Deprecations (removal in next major release)"
 showcontent = true
 
 [[tool.towncrier.type]]
 # New behaviors, public APIs. That sort of stuff.
 directory = "feature"
-name = "Features"
+name = "New features"
 showcontent = true
 
 [[tool.towncrier.type]]
 # New behaviors in existing features.
 directory = "improvement"
-name = "Improvements"
+name = "Improvements in existing functionality"
 showcontent = true
 
 [[tool.towncrier.type]]
 # Something we deemed an improper undesired behavior that got corrected
 # in the release to match pre-agreed expectations.
 directory = "bugfix"
-name = "Bug Fixes"
+name = "Bug fixes"
 showcontent = true
 
 [[tool.towncrier.type]]
 # Updates regarding bundling dependencies.
 directory = "vendor"
-name = "Vendored Libraries"
+name = "Vendored libraries"
 showcontent = true
 
 [[tool.towncrier.type]]
 # Notable updates to the documentation structure or build process.
 directory = "doc"
-name = "Improved Documentation"
+name = "Improved documentation"
 showcontent = true
 
 [[tool.towncrier.type]]
 # Changes that might not even be worth exposing to the end users.
 directory = "trivial"
-name = "Trivial/Internal Changes"
+name = "Trivial/internal changes"
 showcontent = true
 
 [tool.mypy]