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]>

requirements.txt

@@ -13,7 +13,7 @@ beartype>=0.15.0,<0.16.0
 vector-quantize-pytorch>=1.12.0,<1.13.0
 loguru
 rich==13.7.1
-tiktoken==0.6.0
+tiktoken==0.7.0
 transformers==4.41.2
 tqdm==4.66.3
 mkdocs