Update postgres:16 Docker digest to 70e9e45 (#2062)

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

docker-compose.yml

@@ -2,7 +2,7 @@
 name: festival-dev
 services:
   db:
-    image: postgres:16@sha256:361c84f2bbe0f91135990841eb4eb4d2fe491f6e950686d9c746415dd1ffc65e
+    image: postgres:16@sha256:70e9e457f70602fa7a6bc38054accbcb54a3a966c633b1f91e8d84d6b078346a
     env_file: .env
     volumes:
       - db-data:/var/lib/postgresql/data