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

docker-compose.yml

@@ -19,7 +19,7 @@ services:
       - matrix
 
   db:
-    image: docker.io/postgres:17.2-alpine@sha256:7e5df973a74872482e320dcbdeb055e178d6f42de0558b083892c50cda833c96
+    image: docker.io/postgres:17.3-alpine@sha256:8c62578d320ff7257343f9e9d81f687c18e3f817208711b90eccd6c392a07215
     restart: unless-stopped
     environment:
       - POSTGRES_USER=${DC_MATRIX_POSTGRES_USER:-synapse}