Update version & release in meta for release (#58)

- Update version & release for new release
- Update min supported version (Obsidian)
- Update documentation link

meta.xml

@@ -4,13 +4,13 @@
   <name>SpamExperts Email Security</name>
   <description>The application integrates SpamExperts' advanced email security system with Plesk, offering automatic protection of domains and emails as well as a one-click login option to the dedicated SpamExperts control panel to manage specific settings and view detailed statistics.</description>
   <version>1.2</version>
-  <release>5</release>
+  <release>6</release>
   <vendor>N-able SpamExperts</vendor>
   <url>https://www.spamexperts.com/</url>
   <buy_url>https://go.plesk.com/buy-plesk-ext/spamexperts-extension</buy_url>
-  <help_url>https://documentation.solarwindsmsp.com/spamexperts/documentation/Content/Integration/plesk-extn.htm</help_url>
+  <help_url>https://documentation.n-able.com/spamexperts/userguide/Content/Integration/plesk-extn.htm</help_url>
   <support_url>https://www.spamexperts.com/resources/support</support_url>
-  <plesk_min_version>12.5.0</plesk_min_version>
+  <plesk_min_version>18.0.15</plesk_min_version>
   <category>mail</category>
   <category>security</category>
   <!--Localized descriptions below-->