chore(deps): update postgres docker digest to 304ab81 (#56)

Co-authored-by: pactflow-renovate-bot[bot] <186667433+pactflow-renovate-bot[bot]@users.noreply.github.com>

Author: pactflow-renovate-bot[bot]

docker-compose.yml

@@ -18,7 +18,7 @@ services:
       PACT_BROKER_DATABASE_CONNECT_MAX_RETRIES: "10"
       PACT_BROKER_PUBLIC_HEARTBEAT: "true"
   postgres:
-    image: postgres@sha256:4aed4b0525233308fc5de1b8d47f92326460d598dc5f004d14b41f183360b4e9
+    image: postgres@sha256:304ab813518754228f9f792f79d6da36359b82d8ecf418096c636725f8c930ad
     healthcheck:
       test: psql postgres --command "select 1" -U postgres
     ports: