revise readme

README.md

@@ -41,7 +41,7 @@ We constructed this Sarashina2.1-1B model, which consists of 1 billion parameter
 First, we trained the model on 10 trillion tokens, including Japanese and English data extracted from web corpora.
 Then, we trained the model using 1 trillion tokens, predominantly consisting of Japanese data, to enhance its performance in Japanese.
 The following tables show the model's performance on Japanese and English tasks.
-We also show the performance of other public LLMs with approximately 1 billion parameters.
+We also show the performance of other public LLMs for reference.
 
 #### Evaluation in Japanese tasks