updating pipeline

Signed-off-by: Jacob Renn <jacob.renn@squared.ai>

instruct_pipeline.py

@@ -157,4 +157,4 @@ class InstructionTextGenerationPipeline(Pipeline):
         if return_instruction_text:
             return {"instruction_text": instruction_text, "generated_text": decoded}
 
-        return decoded
+        return {'generated_text': decoded}