update readme

Author: taoshengshi

README.md

@@ -1,5 +1,5 @@
 # JZFS
-A version control file system for data linage & data collaboration.
+Golang implementation of JZFS: version control file system for datasets management in the era of AI.
 
 <p align="left">
   <a href="https://codecov.io/gh/jiaozifs/jiaozifs"><img src="https://codecov.io/gh/gitdataai/jiaozifs/branch/main/graph/badge.svg" /></a>
@@ -8,7 +8,7 @@ A version control file system for data linage & data collaboration.
   <br/>
 </p>
 
-<a href="https://github.com/GitDataAI/jzfs"><img src="https://github.com/GitDataAI/jzfs/blob/main/docs/logo/jzfs-go.png?raw=true" width="100" /></a>
+<a href="https://github.com/GitDataAI/jzfs"><img src="https://github.com/GitDataAI/jzfs/blob/main/docs/logo/jzfs-go.png?raw=true" width="80%"/></a>
 
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 JZFS is an industry-leading **Data-Centric Version Control** File System, helps ensure Responsible AI Engineering by improving **Data Versioning**, **Provenance**, and **Reproducibility**.