docs: Finalize CHANGELOG for v1.1.0 release

Move custom slug fix from Unreleased to v1.1.0 section.

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Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

@@ -7,13 +7,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
-### Fixed
-- **Custom Slug Extraction** - Fixed bug where mp-slug was ignored in Micropub requests
-  - Root cause: mp-slug was extracted after normalize_properties() filtered it out
-  - Solution: Extract mp-slug from raw request data before normalization
-  - Affects both form-encoded and JSON Micropub requests
-  - See docs/reports/custom-slug-bug-diagnosis.md for detailed analysis
-
 ## [1.1.0] - 2025-11-25
 
 ### Added
@@ -39,6 +32,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Added `reversed()` wrapper to compensate for feedgen internal ordering
   - Regression test ensures feed matches database DESC order
 
+- **Custom Slug Extraction** - Fixed bug where mp-slug was ignored in Micropub requests
+  - Root cause: mp-slug was extracted after normalize_properties() filtered it out
+  - Solution: Extract mp-slug from raw request data before normalization
+  - Affects both form-encoded and JSON Micropub requests
+  - See docs/reports/custom-slug-bug-diagnosis.md for detailed analysis
+
 ### Changed
 - **Database Migration System** - Renamed for clarity
   - `SCHEMA_SQL` renamed to `INITIAL_SCHEMA_SQL`