Fix duplicate v9.2.0 changelog entry and improve consistency

- Rename first v9.2.0 to v9.2.1 (unreleased) to distinguish from released v9.2.0
- Standardize section header capitalization (Fixed, Added, Changed, Removed)
- Add missing # to issue reference in v9.0.3 (#1184)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: RonnyPfannschmidt

CHANGELOG.md

@@ -1,9 +1,9 @@
 # Changelog
 
 
-## v9.2.0
+## v9.2.1 (unreleased)
 
-### fixed
+### Fixed
 
 - fix #1216: accept and create a warning for usages of `version = attr:` in setuptools config.
   unfortunately dozens of projects cargo-culted that antipattern
@@ -20,24 +20,24 @@
   version inference is automatically enabled with default settings.
 
 
-### removed
+### Removed
 
 - unchecked simplified activation - too many projects use setups where it would fail
 
-### changed
+### Changed
 
 - refine activation logic and add unittest for the relevant cases instead of trying to speedrun setuptools
 
 ## v9.1.1 (yanked)
 
-### fixed
+### Fixed
 
 - fix #1194: correctly handle version keyword when pyproject metadata is missing
 
 
 ## v9.1.0 (yanked)
 
-### fixed
+### Fixed
 
 - complete reiteration of the decision logic for enabling version inference on setuptools_scm
 
@@ -49,9 +49,9 @@
 
 ## v9.0.3 (yanked)
 
-### fixed
+### Fixed
 
-- fix 1184: verify version is dynamic if the dependency is used as indicator for enabling
+- fix #1184: verify version is dynamic if the dependency is used as indicator for enabling
 
 ## v9.0.2 (yanked)