Update REAMDE

Author: yusukehirao

README.md

@@ -9,6 +9,7 @@
 
 - [`@d-zero/packages/@d-zero/dealer`](./packages/%40d-zero/dealer/README.md)
 - [`@d-zero/packages/@d-zero/html-distiller`](./packages/%40d-zero/html-distiller/README.md)
+- [`@d-zero/puppeteer-screenshot`](./packages/%40d-zero/puppeteer-screenshot/README.md)
 - [`@d-zero/puppeteer-scroll`](./packages/%40d-zero/puppeteer-scroll/README.md)
 - [`@d-zero/readtext`](./packages/%40d-zero/readtext/README.md)