docs: update README.md

ony3000 · ony3000 · commit 96049fe99658 · 2023-12-08T23:26:03.000+09:00
diff --git a/README.md b/README.md
@@ -2,7 +2,7 @@
 
 A Prettier plugin that sequentially applies the formatting results of other Prettier plugins.
 
-![Schematic diagram of how formats are merged.](https://github.com/ony3000/prettier-plugin-merge/assets/8164191/0a413542-fff1-436b-859b-76f92ed70a6a)
+![Schematic diagram of how formats are merged.](.github/banner.png)
 
 ## Installation
 
