Update litellm requirement from <1.51,>=1.49 to >=1.49,<1.54

Updates the requirements on [litellm](https://github.com/BerriAI/litellm) to permit the latest version.
- [Release notes](https://github.com/BerriAI/litellm/releases)
- [Commits](BerriAI/litellm@v1.49.0...v1.53.1)

---
updated-dependencies:
- dependency-name: litellm
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -13,7 +13,7 @@ dependencies = [
   "jinja2~=3.0",
   "PyYAML~=6.0",
   "jsonschema~=4.0",
-  "litellm>=1.49,<1.51",
+  "litellm>=1.49,<1.54",
   "termcolor~=2.0",
   "ipython~=8.0",
 ]