docs(admin): Add documentation for contacts example content

admin_manual/groupware/contacts.rst

@@ -79,3 +79,26 @@ or::
 
   # Allow users to create address books without restriction
   php occ config:app:set dav maximumAdressbooks --type=integer --value=-1
+
+Example contact
+---------------
+
+.. versionadded:: 32.0.0
+
+The example contact administration setting allows you to enable the creation of a contact in the user's address book when he logs in for the first time.
+
+To enable the example contact feature:
+
+1. Navigate to the Groupware settings in the admin settings.
+2. Scroll down to the "Example content" section.
+3. Enable the "Example contact" setting with the checkbox 
+
+If you want to set a specific contact that should be created.
+
+4. Press the "Import contact" button.
+5. Choose a vCard file(.vcf) that should be imported as an example contact.
+
+Switching back to the default example contact provided by nextcloud is possible by pressing the "Reset to default contact" button.
+
+.. note::
+    Example contacts will only be created for users that log in for the first time after the feature was enabled.