chore(deps): update docker.io/jc21/nginx-proxy-manager docker tag to v2.12.6

docker-compose/nginxproxymanager/compose.yaml

@@ -5,7 +5,7 @@ volumes:
   nginxproxymanager-db:
 services:
   nginxproxymanager:
-    image: docker.io/jc21/nginx-proxy-manager:2.12.4
+    image: docker.io/jc21/nginx-proxy-manager:2.12.6
     ports:
       - 80:80
       - 81:81