API: flip to ams-pg

Author: Federico Ceratto

ansible/host_vars/ams-api.ooni.nu/vars.yml

@@ -1,4 +1,4 @@
 ---
-oomsm_db_url: 'postgresql://amsapi:{{ metadb_amsapi_password }}@amsmetadb.ooni.nu/metadb'
+oomsm_db_url: 'postgresql://amsapi:{{ metadb_amsapi_password }}@ams-pg.ooni.nu/metadb'
 blocklist_ips: '{{ vault_blocklist_ips }}'
 ...