feat(sidebar): Add explore interest groups menu item

config.toml

@@ -177,6 +177,13 @@ pluralizeListTitles = false
   parent = "collaborations"
   name = "Interest Group Process"
   url = "/org/collaborations/interest-groups/process.php"
+  weight = 2
+
+[[menu.sidebar]]
+  parent = "collaborations"
+  name = "Explore our Interest Groups"
+  url =  "/org/workinggroups/explore.php#interest-groups"
+  weight = 3
 
 [[menu.sidebar]]
   identifier = "security"