chore(deps): update docker.io/postgres docker tag to v17

docker-compose.yml

@@ -19,7 +19,7 @@ services:
       - matrix
 
   db:
-    image: docker.io/postgres:17.4-alpine@sha256:c4c3cded22488238ed0df51b82913b5d3b426fad19fbe205a711f05f5dba5c45
+    image: docker.io/postgres:17.4-alpine@sha256:7062a2109c4b51f3c792c7ea01e83ed12ef9a980886e3b3d380a7d2e5f6ce3f5
     restart: unless-stopped
     environment:
       - POSTGRES_USER=${DC_MATRIX_POSTGRES_USER:-synapse}