Update documentation

https://github.com/pmd/pmd/actions/runs/2734038862
907c0722b3...fb9762877f

pmd_release_notes.html

@@ -1567,6 +1567,7 @@ for the <a href="https://cucumber.io/docs/gherkin/">Gherkin</a> language. It is
     <ul>
       <li><a href="https://github.com/pmd/pmd/pull/4021">#4021</a>: [core] CPD: Add total number of tokens to XML reports</li>
       <li><a href="https://github.com/pmd/pmd/issues/4031">#4031</a>: [core] If report is written to stdout, stdout should not be closed</li>
+      <li><a href="https://github.com/pmd/pmd/pull/4053">#4053</a>: [core] Allow building PMD under Java 18+</li>
     </ul>
   </li>
   <li>java
@@ -1702,7 +1703,7 @@ You can identify them with the <code class="language-plaintext highlighter-rouge
         <div class="col-lg-12 footer">
             &copy;2022 PMD Open Source Project. All rights
             reserved. <br />
-             Site last generated: Jul 23, 2022 <br />
+             Site last generated: Jul 25, 2022 <br />
             <p>
                 <img src="images/pmd-logo-small.png" alt="Company
                 logo"/>