fix: signalgo puppet-ed user regex

Co-authored-by: lon <114724657+longregen@users.noreply.github.com>

roles/custom/matrix-bridge-mautrix-signalgo/defaults/main.yml

@@ -141,7 +141,7 @@ matrix_mautrix_signalgo_registration_yaml: |
   rate_limited: false
   namespaces:
       users:
-      - regex: '^@signalgo_[0-9]+:{{ matrix_mautrix_signalgo_homeserver_domain | regex_escape }}$'
+      - regex: '^@signalgo_[-a-f0-9]+:{{ matrix_mautrix_signalgo_homeserver_domain | regex_escape }}$'
         exclusive: true
       - exclusive: true
         regex: '^@{{ matrix_mautrix_signalgo_appservice_bot_username | regex_escape }}:{{ matrix_mautrix_signalgo_homeserver_domain | regex_escape }}$'