🔧 chore(validate.py): add input_types to template_field in post_validate_prompt function

The input_types attribute is added to the template_field in the post_validate_prompt function. This change allows for specifying the input types that are accepted for the template field, providing more flexibility and control over the input data.

src/backend/langflow/api/v1/validate.py

@@ -42,6 +42,7 @@ def post_validate_prompt(prompt: ValidatePromptRequest):
                     field_type="str",
                     show=True,
                     advanced=False,
+                    input_types=["BaseLoader"],
                 )
 
                 prompt.frontend_node.template[variable] = template_field.to_dict()