docs: update v0.3.0 release notes with auto-increment bundle version

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Author: trkim

docs/releases/v0.3.0.md

@@ -8,6 +8,7 @@ MediaFloat v0.3.0 focuses on permission guidance, layout stability, and internal
 - **MIT License and privacy notice**: The Support screen now shows the MIT license and explicitly states that no personal information is collected, stored, or transmitted.
 - **Layout boundary refactor**: Runtime and media responsibilities have been extracted into focused helpers (`MediaControllerSelector`, `MediaRecoveryPolicy`, `MediaArtworkCandidateResolver`, `OverlayLayoutCalculator`, `OverlayBitmapLoader`, `OverlayPresentationSpec`) to reduce coupling and improve testability.
 - **Removed Product Constraints card**: The Support screen is now cleaner and more focused on what users actually need.
+- **Auto-increment bundle version**: The release workflow now automatically bumps the `versionCode` during release builds to prevent Play Store conflicts.
 
 ## Notes