chore(deps): update postgres docker tag from 18.2 to v18.3 (docker-compose.yml)

Author: renovate[bot]

docker-compose.yml

@@ -120,7 +120,7 @@ services:
           source: ./docker/extra_settings
           target: /app/docker/extra_settings
   postgres:
-    image: postgres:18.2-alpine@sha256:035b9ab53cfa147d7202b61f5f7782b939ae815b7d6bc81c96b7b42ff1fca950
+    image: postgres:18.3-alpine@sha256:97e0c20847f5fe90be7e002ce2619be71f037e898f6c7364ad59e3826d60fee5
     environment:
       PGDATA: /var/lib/postgresql/data
       POSTGRES_DB: ${DD_DATABASE_NAME:-defectdojo}