title: replace "&amp;" to "&" in xml in mule 4
body: <p>I have a XML where I want to replace <code>&amp;amp;</code> with <code>&amp;</code>. I tried to convert the XML to JSON and replace <code>&amp;amp;</code> with <code>&amp;</code>. Also tried to make it as a string but at last when I'm transforming it into XML again getting the <code>&amp;amp;</code>.
  How can I fix this?</p>
  
  <p>Input: </p>
  
  <pre><code>&lt;data&gt;&amp;amp;lt;?xml version="1.0" encoding="utf-8" ?&amp;amp;gt;&amp;amp;lt;bridge &amp;amp;gt;&lt;/data&gt;
  </code></pre>
  
  <p>Expectation:</p>
  
  <pre><code>&lt;data&gt;&amp;lt;?xml version="1.0" encoding="utf-8" ?&amp;gt;&amp;lt;bridge &amp;;gt;&lt;/data&gt;
  </code></pre>