Update postgres:16.6-alpine Docker digest to 161619c

plausible/docker-compose.yml

@@ -7,7 +7,7 @@ networks:
 services:
   plausible_db:
     restart: unless-stopped
-    image: postgres:16.6-alpine@sha256:52bba373df3c13594014b5e9ccc9f3c2cdb2221d50db1a91ec64570819f18aba
+    image: postgres:16.6-alpine@sha256:161619c29df5fa5f5ba0d107dd416ddccb9a8e091e53fa2ddbec23cb7b1736f0
     volumes:
       - /home/aosus/plausible/postgres:/var/lib/postgresql/data
     environment: