Update postgres:18.1-alpine Docker digest from 18.1 to 18.1-alpine (docker-compose.yml) (#13711)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docker-compose.yml

@@ -120,7 +120,7 @@ services:
           source: ./docker/extra_settings
           target: /app/docker/extra_settings
   postgres:
-    image: postgres:18.1-alpine@sha256:db3b1082629f4b3a15390436f64ed4de1676b2e593d8282a50f40e92e20e6a9d
+    image: postgres:18.1-alpine@sha256:154ea39af68ff30dec041cd1f1b5600009993724c811dbadde54126eb10bedd1
     environment:
       POSTGRES_DB: ${DD_DATABASE_NAME:-defectdojo}
       POSTGRES_USER: ${DD_DATABASE_USER:-defectdojo}