Change next release version to 0.9.4 (#234)

## Description

As there are no breaking changes.

## Summary (check all that apply)

- [ ] Modified / added code
- [ ] Modified / added tests
- [ ] Modified / added examples
- [x] Modified / added others (pubspec.yaml, workflows, etc...)
- [ ] Updated README
- [ ] Contains breaking changes
  - [ ] Created / updated migration guide
- [ ] Incremented version number
  - [ ] Updated CHANGELOG

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 0.10.0 Aug 31, 2024
+## 0.9.4 Aug 31, 2024
 
 - Add `SwipeDismissSensitivity`, a way to customize sensitivity of swipe-to-dismiss action on modal sheet (#222)
 

pubspec.yaml

@@ -1,6 +1,6 @@
 name: smooth_sheets
 description: Sheet widgets with smooth motion and great flexibility. Also supports nested navigation in both imperative and declarative ways.
-version: 0.10.0
+version: 0.9.4
 repository: https://github.com/fujidaiti/smooth_sheets
 screenshots:
   - description: Practical examples of smooth_sheets.