chore: update README.md

ony3000 · ony3000 · commit b46edd7099a6 · 2026-01-15T00:25:39.000+09:00
diff --git a/README.md b/README.md
@@ -180,3 +180,7 @@ JSON example:
   ]
 }
 ```
+
+## Stargazers over time
+
+[![Stargazers over time](https://starchart.cc/ony3000/prettier-plugin-classnames.svg?variant=adaptive)](https://starchart.cc/ony3000/prettier-plugin-classnames)

Original file line number	Diff line number	Diff line change
`@@ -180,3 +180,7 @@ JSON example:`
`180`	`180`	`]`
`181`	`181`	`}`
`182`	`182`	```
	`183`	`+`
	`184`	`+## Stargazers over time`
	`185`	`+`
	`186`	`+[![Stargazers over time](https://starchart.cc/ony3000/prettier-plugin-classnames.svg?variant=adaptive)](https://starchart.cc/ony3000/prettier-plugin-classnames)`