Fix cfddns to use latest tag

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/cfddns/config.json

@@ -7,7 +7,7 @@
   "dynamic_config": true,
   "no_gui": true,
   "tipi_version": 7,
-  "version": "1.17.0",
+  "version": "latest",
   "categories": [
     "network",
     "utilities"

apps/cfddns/docker-compose.json

@@ -4,7 +4,7 @@
   "services": [
     {
       "name": "cfddns",
-      "image": "favonia/cloudflare-ddns:1.17.0",
+      "image": "favonia/cloudflare-ddns:latest",
       "isMain": true,
       "environment": [
         {