Revert "Change default public_media path to omit `matrix.` from the path as it has been found that URLs generated by the bridge will only match {{ matrix_domain }}"

This reverts commit 5f399effb9.

roles/custom/matrix-bridge-steam/defaults/main.yml

@@ -34,7 +34,7 @@ matrix_steam_bridge_appservice_port: "8080"
 matrix_steam_bridge_msc4190_enabled: "{{ matrix_bridges_msc4190_enabled }}"
 
 # A public address that external services can use to reach this appservice
-matrix_steam_bridge_appservice_public_address: "https://{{ matrix_domain }}"
+matrix_steam_bridge_appservice_public_address: "https://{{ matrix_server_fqn_matrix }}"
 
 # Public media configuration for external access to bridge media
 matrix_steam_bridge_public_media_enabled: true