Bump environs from 11.2.1 to 14.1.1

Bumps [environs](https://github.com/sloria/environs) from 11.2.1 to 14.1.1.
- [Changelog](https://github.com/sloria/environs/blob/main/CHANGELOG.md)
- [Commits](sloria/environs@11.2.1...14.1.1)

---
updated-dependencies:
- dependency-name: environs
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/backend/requirements.txt

@@ -61,7 +61,7 @@ deprecated==1.2.15
     #   opentelemetry-semantic-conventions
 distro==1.9.0
     # via openai
-environs==11.2.1
+environs==14.1.1
     # via fastapi-app (pyproject.toml)
 exceptiongroup==1.2.2
     # via anyio