fix: include clipboard API in legacy iframe integrations

Author: nicholaswmin

build/index.html

@@ -623,7 +623,7 @@ <h2 id='use-your-own-domain'>Use your own domain</h2><div class="highlight"><pre
  --&gt;</span>
 <span class="nt">&lt;iframe</span>
   <span class="na">src=</span><span class="s">"https://bitpaper.io/go/Maths/xdXfoI?access-token=eyJhbGciO&amp;user_name=John%20Doe"</span>
-  <span class="na">allow=</span><span class="s">"camera; microphone; display-capture;"</span>
+  <span class="na">allow=</span><span class="s">"camera; microphone; display-capture; clipboard-read; clipboard-write;"</span>
   <span class="na">style=</span><span class="s">"
     position: fixed;
     top: 0px;

source/index.html.md

@@ -268,7 +268,7 @@ third-party whiteboard.
  -->
 <iframe
   src="https://bitpaper.io/go/Maths/xdXfoI?access-token=eyJhbGciO&user_name=John%20Doe"
-  allow="camera; microphone; display-capture;"
+  allow="camera; microphone; display-capture; clipboard-read; clipboard-write;"
   style="
     position: fixed;
     top: 0px;