docs: update link to General docs

Author: justadreamer

docs/DoxygenLayout.xml

@@ -2,7 +2,7 @@
   <!-- Generated by doxygen 1.8.13 -->
   <!-- Navigation index tabs for HTML output -->
  <navindex>
-  <tab type="user" visible="yes" title="General Docs" url="../../documentation/4.4/index.html"/>
+  <tab type="user" visible="yes" title="General Docs" url="/documentation/4.5/index.html"/>
   <tab type="pages" visible="yes" title="" intro=""/>
   <tab type="modules" visible="yes" title="Nginx Module" intro="51Degrees Nginx module. These contain the logic which expose the functionality of the C API to Nginx configuration."/>
   <tab type="examples" visible="yes" title="Examples" intro="51Degrees Device Detection API examples for Nginx. These show how the API can be used in Nginx configuration file."/>