Fix docs: change oracle jdk link to open jdk link

Author: toshihidetagami

app/views/gettingStarted.scala.html

@@ -33,7 +33,7 @@ <h3><span>&raquo;</span> Learn whether Play Framework is right for your project<
                     <h3><span>&raquo;</span> Try the Hello World Tutorial</h3>
                     <div class="try-option-content">
                         <p>The Java and Scala Hello World projects are self-contained tutorials that include a distribution of the sbt build tool.</p>
-                        <p>Play requires Java 8 or higher. Check your version with the <code>java -version</code> command and if needed, install it from <a href="//www.oracle.com/technetwork/java/javase/downloads/index.html" rel="noopener">Oracle's site</a>.</p>
+                        <p>Play requires Java 8 or higher. Check your version with the <code>java -version</code> command and if needed, install it from <a href="https://adoptium.net/" rel="noopener">Adoptium</a>.</p>
                         <p>To try the tutorial, first download the Java or Scala project:</p>
                             <table>
                             @examples.sections.map { case (version, section) =>