fix: potential fix for code scanning alert no. 4: Incomplete multi-character sanitization

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: mutoe

playwright/utils/prettify.ts

@@ -1,7 +1,12 @@
 import { prettyPrint } from 'html'
 
 export function formatHTML(rawHTMLString: string): string {
-  const removeComments = rawHTMLString.replaceAll(/<!--.*?-->/gs, '')
+  let removeComments = rawHTMLString
+  let prev
+  do {
+    prev = removeComments
+    removeComments = removeComments.replaceAll(/<!--.*?-->/gs, '')
+  } while (removeComments !== prev)
   // eslint-disable-next-line camelcase
   const pretty = prettyPrint(removeComments, { indent_size: 2 })
   const removeEmptyLines = `${pretty}\n`.replaceAll(/\n{2,}/g, '\n')