[docker] Update postgres Docker tag to v18

Author: renovate[bot]

docker-compose.dev.yml

@@ -2,7 +2,7 @@ version: '3'
 services:
   openbas-dev-pgsql:
     container_name: openbas-dev-pgsql
-    image: postgres:17-alpine
+    image: postgres:18-alpine
     environment:
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}

docker-compose.yml

@@ -1,6 +1,6 @@
 services:
   pgsql:
-    image: postgres:17-alpine
+    image: postgres:18-alpine
     environment:
       POSTGRES_USER: ${POSTGRES_USER}
       POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}