Update the default documentation version link

The default URL of the online Pentaho documentation changes with each release. When upgrading, you may need to update this URL parameter in the pentaho.xml file.

1. Navigate to the pentaho/server/pentaho-server/pentaho-solutions/system directory and open the pentaho.xml file with any text editor.
2. Modify the following <documentation-url> line and replace the previous documentation value with the current documentation value: <documentation-url>https://help.hitachivantara.com/Documentation/Pentaho/Data_Integration_and_Analytics/10.2</documentation-url>.
3. Save and close the file.