chore(deps): update postgres docker tag to v18

apps/mealie/docker-compose.yml

@@ -38,7 +38,7 @@ services:
       - traefik.http.services.mealie.loadbalancer.server.port=9000
 
   mealie-postgres:
-    image: postgres:17.9@sha256:5b96f1a16bd9768b060dd2ffe55cb6225c4d9ef4d214a8b21eb08134869a97e4
+    image: postgres:18.4@sha256:8ff36f3c66371cba71d20ceedccfc3de9669a68737607888c4ef0af93abe8e39
     container_name: mealie-postgres
     restart: unless-stopped
 

apps/nextcloud/docker-compose.yml

@@ -46,7 +46,7 @@ services:
       - "traefik.http.services.nextcloud.loadbalancer.server.port=80"
 
   nextcloud-postgres:
-    image: postgres:17.9@sha256:5b96f1a16bd9768b060dd2ffe55cb6225c4d9ef4d214a8b21eb08134869a97e4
+    image: postgres:18.4@sha256:8ff36f3c66371cba71d20ceedccfc3de9669a68737607888c4ef0af93abe8e39
     container_name: nextcloud-postgres
     restart: unless-stopped
     environment:

infra/postgresql17/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   postgresql17:
-    image: postgres:17.9@sha256:5b96f1a16bd9768b060dd2ffe55cb6225c4d9ef4d214a8b21eb08134869a97e4
+    image: postgres:18.4@sha256:8ff36f3c66371cba71d20ceedccfc3de9669a68737607888c4ef0af93abe8e39
     container_name: postgresql17
     restart: unless-stopped