Fix authorization header validation to handle bearer types correctly …

…- "authorization config header is required" error (langgenius#6040)

api/core/workflow/nodes/http_request/http_executor.py

@@ -212,7 +212,7 @@ def _assembling_headers(self) -> dict[str, Any]:
                 raise ValueError('self.authorization config is required')
             if authorization.config is None:
                 raise ValueError('authorization config is required')
-            if authorization.config.header is None:
+            if authorization.config.type != 'bearer' and authorization.config.header is None:
                 raise ValueError('authorization config header is required')
 
             if self.authorization.config.api_key is None: