fix media routing

roles/matrix-nginx-proxy/defaults/main.yml

@@ -314,7 +314,7 @@ matrix_nginx_proxy_synapse_generic_worker_locations: [
 ]
 
 matrix_nginx_proxy_synapse_media_repository_locations: [
-  '^/_matrix/media/$',
+  '^/_matrix/media/',
   '^/_synapse/admin/v1/purge_media_cache$',
   '^/_synapse/admin/v1/room/.*/media.*$',
   '^/_synapse/admin/v1/user/.*/media.*$',