Update aiosqlite requirement from ~=0.20 to ~=0.21

Updates the requirements on [aiosqlite](https://github.com/omnilib/aiosqlite) to permit the latest version.
- [Changelog](https://github.com/omnilib/aiosqlite/blob/main/CHANGELOG.md)
- [Commits](omnilib/aiosqlite@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: aiosqlite
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -5,5 +5,5 @@ blurhash-python~=1.2
 pillow>=9.3.0
 beautifulsoup4~=4.13
 pydantic~=2.10
-aiosqlite~=0.20
+aiosqlite~=0.21
 orjson~=3.10