chore(deps): bump tiktoken from 0.5.2 to 0.6.0 in /apps/api

Bumps [tiktoken](https://github.com/openai/tiktoken) from 0.5.2 to 0.6.0.
- [Release notes](https://github.com/openai/tiktoken/releases)
- [Changelog](https://github.com/openai/tiktoken/blob/main/CHANGELOG.md)
- [Commits](https://github.com/openai/tiktoken/compare/0.5.2...0.6.0)

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

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

apps/api/pyproject.toml

@@ -35,7 +35,7 @@ requests = "^2.31.0"
 resend = "^0.8.0"
 sentry-sdk = {extras = ["fastapi"], version = "^1.39.2"}
 sqlmodel = "^0.0.16"
-tiktoken = "^0.5.2"
+tiktoken = "^0.6.0"
 uvicorn = "0.29.0"
 
 [build-system]