fix: escape jinja '.'

roles/custom/matrix-bridge-mautrix-signalgo/templates/config.yaml.j2

@@ -87,11 +87,11 @@ metrics:
 # Bridge config
 bridge:
     # Localpart template of MXIDs for Signal users.
-    # {{.}} is replaced with the internal ID of the Signal user.
-    username_template: signal_{{.}}
+    # {{ '{{.}}' }} is replaced with the internal ID of the Signal user.
+    username_template: "{{ 'signalgo_{{.}}' }}"
     # Displayname template for Signal users. This is also used as the room name in DMs if private_chat_portal_meta is enabled.
     # Available variables: TODO
-    displayname_template: '{{.ProfileName}} (Signalgo)'
+    displayname_template: "{{ '{{.ProfileName}} (Signalgo)' }}"
     # Whether to explicitly set the avatar and room name for private chat portal rooms.
     # If set to `default`, this will be enabled in encrypted rooms and disabled in unencrypted rooms.
     # If set to `always`, all DM rooms will have explicit names and avatars set.