Update catalog information

catalog.json

@@ -473,7 +473,7 @@
             "latest_version": "1.0.0",
             "latest_app_version": "2.10.2",
             "latest_human_version": "2.10.2_1.0.0",
-            "last_update": null,
+            "last_update": "2023-04-19 22:26:54",
             "name": "nginx-proxy-manager",
             "recommended": false,
             "title": "Nginx Proxy Manager",