Clarify websocket address is needed

modules/documents/app/components/documents/admin/collaboration_settings/settings_form_component.rb

@@ -63,10 +63,10 @@ module Documents
         def invalid_hocuspocus_url?
           return false if Setting.collaborative_editing_hocuspocus_url.blank?
 
-          !valid_hocuspocus_url?(Setting.collaborative_editing_hocuspocus_url)
+          !websocket_url?(Setting.collaborative_editing_hocuspocus_url)
         end
 
-        def valid_hocuspocus_url?(url)
+        def websocket_url?(url)
           uri = URI.parse(url)
           uri.is_a?(URI::WS) || uri.is_a?(URI::WSS)
         rescue URI::InvalidURIError

modules/documents/config/locales/en.yml

@@ -151,7 +151,7 @@ en:
           some_unwritable: Some values are configured via environment variables and cannot be edited here.
         hocuspocus_server_url:
           label: "Hocuspocus server URL"
-          caption: "The address of a working Hocuspocus server."
+          caption: "The WebSocket address of a working Hocuspocus server."
           invalid_scheme: "Must use a WebSocket protocol (ws:// or wss://)."
         hocuspocus_server_secret:
           label: "Client secret"

modules/documents/spec/features/documents/admin/settings/document_collaboration_settings_spec.rb

@@ -100,7 +100,7 @@ RSpec.describe "Document collaboration settings admin",
       click_on("Save")
 
       # Inline validation shown on the field
-      expect(page).to have_content("is not a supported protocol")
+      expect(page).to have_content("Must use a WebSocket protocol (ws:// or wss://).")
 
       # Setting unchanged
       expect(Setting.collaborative_editing_hocuspocus_url).to eq("wss://hocuspocus.example.com")