chore(deps): bump peewee from 3.17.5 to 3.17.6 in /backend

Bumps [peewee](https://github.com/coleifer/peewee) from 3.17.5 to 3.17.6.
- [Release notes](https://github.com/coleifer/peewee/releases)
- [Changelog](https://github.com/coleifer/peewee/blob/master/CHANGELOG.md)
- [Commits](https://github.com/coleifer/peewee/compare/3.17.5...3.17.6

)

---
updated-dependencies:
- dependency-name: peewee
  dependency-type: direct:production
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

backend/requirements.txt

@@ -14,7 +14,7 @@ requests==2.32.3
 aiohttp==3.9.5
 sqlalchemy==2.0.30
 alembic==1.13.1
-peewee==3.17.5
+peewee==3.17.6
 peewee-migrate==1.12.2
 psycopg2-binary==2.9.9
 PyMySQL==1.1.1