fix(deps): widen litellm extra to >=1.84,<2

The litellm extra was capped at <1.85, which excludes future
patch lines and reintroduces resolution failures under uv/pip.
Widen to >=1.84.0,<2 so the extra resolves cleanly against
crewai's openai/python-dotenv pins.

Closes OSS-71

lib/crewai/pyproject.toml

@@ -88,7 +88,7 @@ voyageai = [
     "voyageai~=0.3.5",
 ]
 litellm = [
-    "litellm>=1.84.0,<1.85",
+    "litellm>=1.84.0,<2",
 ]
 bedrock = [
     "boto3~=1.42.79",