index.js: change link to list of pulic XMPP providers for registrations

The old compliance.conversations.im is not intended for users to pick a server.

src/plugins/register/index.js

@@ -42,7 +42,7 @@ converse.plugins.add('converse-register', {
         api.settings.extend({
             allow_registration: true,
             domain_placeholder: __(' e.g. conversejs.org'), // Placeholder text shown in the domain input on the registration form
-            providers_link: 'https://compliance.conversations.im/', // Link to XMPP providers shown on registration page
+            providers_link: 'https://providers.xmpp.net/', // Link to XMPP providers shown on registration page
             registration_domain: ''
         });