chore(deps): update postgres docker tag to v18

Author: renovate[bot]

.github/workflows/generate-screenshots.yml

@@ -20,7 +20,7 @@ jobs:
 
     services:
       postgres:
-        image: postgres:17-alpine
+        image: postgres:18-alpine
         env:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres

docker-compose.yaml

@@ -1,6 +1,6 @@
 services:
   postgres:
-    image: postgres:17-alpine
+    image: postgres:18-alpine
     container_name: cocktail-recipe-postgres
     ports:
       - '5432:5432'