Update netbox_contact_group_module.rst

fix typo slug -> Name

Author: akurach

docs/plugins/netbox_contact_group_module.rst

@@ -295,7 +295,7 @@ Parameters
 
         <div class="ansible-option-indent-desc"></div><div class="ansible-option-cell">
 
-      Slug of the parent contact group
+      Name of the parent contact group
 
 
       .. raw:: html