fix(base.py): set OpenAI API Key field as not required

src/backend/langflow/template/base.py

@@ -225,6 +225,6 @@ class FrontendNode(BaseModel):
                 field.is_list = True
         if "api_key" in key and "OpenAI" in str(name):
             field.display_name = "OpenAI API Key"
-            field.required = True
+            field.required = False
             if field.value is None:
                 field.value = ""