chore(weave): Pin dspy litellm dep #2691

pyproject.toml

@@ -50,7 +50,7 @@ docs = ["playwright", "lazydocs", "nbformat", "nbconvert"]
 anthropic = ["anthropic>=0.18.0"]
 cerebras = ["cerebras-cloud-sdk"]
 cohere = ["cohere>=5.9.1,<5.9.3"]
-dspy = ["dspy>=0.1.5"]
+dspy = ["dspy>=0.1.5", "litellm<=1.49.1"]
 groq = ["groq>=0.9.0"]
 instructor = ["instructor>=1.4.3"]
 langchain = [