Fix grammar error in summarization pipeline (#23080)

Fix minor grammar issue

src/transformers/pipelines/text2text_generation.py

@@ -273,7 +273,7 @@ class SummarizationPipeline(Text2TextGenerationPipeline):
 
         if input_length < max_length:
             logger.warning(
-                f"Your max_length is set to {max_length}, but you input_length is only {input_length}. You might "
+                f"Your max_length is set to {max_length}, but your input_length is only {input_length}. You might "
                 f"consider decreasing max_length manually, e.g. summarizer('...', max_length={input_length//2})"
             )