Update README.md

add a bar chart to illustrate crystalcoder's performance in benchmarks

README.md

@@ -21,6 +21,8 @@ It demonstrates superior performance in benchmarks like MMLU, HumanEval, and MBP
 By comparing CrystalCoder with other similar work, CrystalCoder is quite balance on language and coding tasks.
 
 <center><img src="performance_in_benchmarks.png" alt="performance in benchmarks" /></center>
+<center><img src="performance_in_benchmarks_barchart.png" alt="performance in benchmarks barchart" /></center>
+
 
 **Notes**
 - We compute all evaluation metrics ourselves.