fix(v1): re-apply markdown rendering fix for center tags and disable directory urls

docs/javascript.md

@@ -69,8 +69,10 @@
 
 ??? note "Click to expand!"
 
-    <center>
+    <center markdown="1">
+
     <iframe width="560" height="315" src="https://www.youtube.com/embed/2JYT5f2isg4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" allowfullscreen></iframe>
+
     </center>
 
 ## Tweets
@@ -78,7 +80,9 @@
 <details>
   <summary>Click to expand!</summary>
 
-<center>
+<center markdown="1">
+
 <blockquote class="twitter-tweet"><p lang="en" dir="ltr">If you&#39;re learning JavaScript, you&#39;ve likely heard people tell you how important it is to learn the fundamentals.<br><br>But what are they? And where do you learn them?<br><br>Here&#39;s a list of JavaScript fundamentals and my favorite free resources for learning them. 👇</p>&mdash; Madison Kanna (@Madisonkanna) <a href="https://twitter.com/Madisonkanna/status/1274424134139666432?ref_src=twsrc%5Etfw">June 20, 2020</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
+
 </center>
 </details>