Fix ForwardRef._evaluate() keyword-only argument for Python 3.13+

In Python 3.13+, ForwardRef._evaluate() requires 'recursive_guard'
as a keyword-only argument. Pass it as keyword to support both
older and newer Python versions.

fastapi/dependencies/utils.py

@@ -278,7 +278,7 @@ def _resolve_forward_ref_lenient(
             return Any
 
     localns = _LenientNamespace(globalns)
-    result = fwd_ref._evaluate(globalns, localns, set())
+    result = fwd_ref._evaluate(globalns, localns, recursive_guard=set())
     return result