Mirror postgres-13 image (#30047)

* Mirror postgres-13 image

server/scripts/mirror-docker-images.json

@@ -1,7 +1,8 @@
 {
   "postgres": {
     "10": "postgres:10@sha256:7a484b11fcabd39596b1bf08780cdb61fa9b0d8bfad0844dbdce3a6922df95d1",
-    "12": "postgres:12@sha256:cc7a021d9aff3aa02788d35c27a5cc32d4790ad92d72232a6be75b76ab7d79db"
+    "12": "postgres:12@sha256:cc7a021d9aff3aa02788d35c27a5cc32d4790ad92d72232a6be75b76ab7d79db",
+    "13": "postgres:13@sha256:1b154a7bbf474aa1a2e67dc7c976835645fe6c3425320e7ad3f5a926d509e8fc"
   },
   "mysql": {
     "8.0.32": "mysql/mysql-server:8.0.32@sha256:d6c8301b7834c5b9c2b733b10b7e630f441af7bc917c74dba379f24eeeb6a313"