Update pyproject.toml

Co-authored-by: Copilot <[email protected]>

Author: xiangfu0

pyproject.toml

@@ -14,6 +14,7 @@ ciso8601 = "^2.1.3"
 httpx = "0.28.1"
 sqlalchemy = {version = ">=1.4,<2", optional = true}
 requests = "^2.25.0"
+# Explicitly pinning h11 to version 0.16.0 to override a CVE-affected transitive dependency in httpx.
 h11 = "0.16.0"
 
 [tool.poetry.extras]