Bump py-serializable from 1.0.3 to 1.1.2 in /backend

Bumps [py-serializable](https://github.com/madpah/serializable) from 1.0.3 to 1.1.2.
- [Release notes](https://github.com/madpah/serializable/releases)
- [Changelog](https://github.com/madpah/serializable/blob/main/CHANGELOG.md)
- [Commits](madpah/serializable@v1.0.3...v1.1.2)

---
updated-dependencies:
- dependency-name: py-serializable
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

backend/requirements.txt

@@ -27,7 +27,7 @@ packaging==23.2
 pip-api==0.0.30
 pip-requirements-parser==32.0.1
 pip_audit==2.7.2
-py-serializable==1.0.3
+py-serializable==1.1.2
 Pygments==2.17.2
 pyparsing==3.1.1
 python-dotenv==1.0.1