docs: correct minimum required JDK

src/site/xdoc/docs/installationguide.xml.vm

diff --git a/src/site/xdoc/docs/installationguide.xml.vm b/src/site/xdoc/docs/installationguide.xml.vm
index 833e010..5ab7f1e 100644
--- a/src/site/xdoc/docs/installationguide.xml.vm
+++ b/src/site/xdoc/docs/installationguide.xml.vm
@@ -117,9 +117,7 @@
 <tbody>

 <tr>

 <td>Java Development Kit (JDK)</td>

-<td>1.8 or later (For instructions on setting up the JDK in

-different operating systems, visit <a href=

-"http://java.sun.com/">http://java.sun.com</a>)</td>

+<td>17 or later</td>

 </tr>

 <tr>

 <td>Disk</td>