doc: fix word wrapping for api stability boxes

PR-URL: https://github.com/nodejs/node/pull/14809
Fixes: https://github.com/nodejs/nodejs.org/issues/1337
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Daijiro Wachi <daijiro.wachi@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

tools/doc/html.js

@@ -400,7 +400,7 @@ function parseAPIHeader(text) {
 
   text = text.replace(
     STABILITY_TEXT_REG_EXP,
-    `<pre class="${classNames}"><a href="${docsUrl}">$1 $2</a>$3</pre>`
+    `<div class="${classNames}"><a href="${docsUrl}">$1 $2</a>$3</div>`
   );
   return text;
 }