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

docker-compose.yml

@@ -19,7 +19,7 @@ services:
       - matrix
 
   db:
-    image: docker.io/postgres:12.22-alpine@sha256:b7e92d0a2455473f0dfa897c2bc5a72ed2cce15fb21f0acb7a8ddc3ad7098d61
+    image: docker.io/postgres:17.2-alpine@sha256:d37d2c160d34430877c802e5adc22824a2ad453499db9bab1a2ceb2be6c1a46f
     restart: unless-stopped
     environment:
       - POSTGRES_USER=${DC_MATRIX_POSTGRES_USER:-synapse}