Doc fix: documentation link for apt

Fixes `check_apt` documentation link to point to the right man page.

diff --git a/doc/10-icinga-template-library.md b/doc/10-icinga-template-library.md
index a9a8616512b3568d5abb6e6004be6fc44244db0d..382e9b52d66e92596faea67ca7632d30fe7e4427 100644 (file)
--- a/doc/10-icinga-template-library.md
+++ b/doc/10-icinga-template-library.md
@@ -182,7 +182,7 @@ which contains the path of the plugins from the Monitoring Plugins project.
 
 ### apt <a id="plugin-check-command-apt"></a>
 
-The plugin [apt](https://www.monitoring-plugins.org/doc/index.html) checks for software updates on systems that use
+The plugin [apt](https://www.monitoring-plugins.org/doc/man/check_apt.html) checks for software updates on systems that use
 package management systems based on the apt-get(8) command found in Debian based systems.
 
 Custom attributes passed as [command parameters](03-monitoring-basics.md#command-passing-parameters):