chores!: bump postgres to 16.1

Existing databases will prevent this from booting. If you want to stay on
postgres 14, modify `docker-compose.yaml`'s `services.db.image`.

BREAKING: update postgres image major version from 14 to 16

docker-compose.yaml

@@ -1,7 +1,7 @@
 services:
 
   db:
-    image: 'docker.io/library/postgres:14.8'
+    image: 'docker.io/library/postgres:16.1'
     environment:
       POSTGRES_DATABASE: "${BOTTIN_POSTGRES_DATABASE}"
       POSTGRES_PASSWORD: "${BOTTIN_POSTGRES_PASSWORD}"