chore(deps): update postgres docker digest to 81f32a8 (#32)

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@sha256:446b42645b83e67ae8f3cf24a4a215da7e0d30bcdf83debb6d97619512cbb942
+    image: postgres@sha256:81f32a88ec561664634637dd446487efd5f9d90996304b96210078e90e5c8b21
     healthcheck:
       test: psql postgres --command "select 1" -U postgres
     ports: