Bump tiktoken from 0.6.0 to 0.7.0

Bumps [tiktoken](https://github.com/openai/tiktoken) from 0.6.0 to 0.7.0.
- [Release notes](https://github.com/openai/tiktoken/releases)
- [Changelog](https://github.com/openai/tiktoken/blob/main/CHANGELOG.md)
- [Commits](openai/tiktoken@0.6.0...0.7.0)

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

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

Author: dependabot[bot]

src/requirements.txt

@@ -147,7 +147,7 @@ sqlalchemy[asyncio]==2.0.30
     # via fastapi_app (pyproject.toml)
 starlette==0.37.2
     # via fastapi
-tiktoken==0.6.0
+tiktoken==0.7.0
     # via
     #   fastapi_app (pyproject.toml)
     #   openai-messages-token-helper