fix: relax requests version requirement for Colab compatibility

- Change requests requirement from >=2.32.4 to >=2.32.0
- Allows Colab's requests==2.32.3 to satisfy the requirement
- Resolves dependency conflict when installing google-adk>=1.8.0 in Colab

Fixes #2319

Author: devesh1011

pyproject.toml

@@ -45,7 +45,7 @@ dependencies = [
   "pydantic>=2.0, <3.0.0",                          # For data validation/models
   "python-dateutil>=2.9.0.post0",                   # For Vertext AI Session Service
   "python-dotenv>=1.0.0",                           # To manage environment variables
-  "requests>=2.32.4",
+  "requests>=2.32.0",
   "sqlalchemy>=2.0",                                # SQL database ORM
   "starlette>=0.46.2",                              # For FastAPI CLI
   "tenacity>=8.0.0",                                # For Retry management