doc: Update README.md

README.md

@@ -1,5 +1,6 @@
 recursive-readdir-files
 ===
+<!--rehype:style=display: flex; height: 230px; align-items: center; justify-content: center; font-size: 38px; background: #f6f8fa; border: 0; border-radius: 5px;-->
 
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