chore(tess_example.yml): set registration to true

Author: kennethrioja

config/tess.example.yml

@@ -170,7 +170,7 @@ default: &default
     collection_curation: true
     spaces: false
     invitation: false
-    registration: false
+    registration: true
     login_through_oidc_only: false # when true, only the first oidc authentication will be available in TeSS, useful when you have your org SSO. Be careful! invitation and registration must be false when using this feature.
   restrict_content_provider_selection: false
   user_ingestion_methods: ['bioschemas']