[percona] Update psmdb-42 version

library/percona

@@ -27,8 +27,8 @@ GitCommit: c6c38e717a00144f7ee7faa488741b6ea60235cc
 Directory: percona-server-mongodb-4.4
 File: Dockerfile
 
-Tags: psmdb-4.2.14, psmdb-4.2
-GitCommit: 5a7b7589afe005db9e296ebb2970225b5d5eb926
+Tags: psmdb-4.2.15, psmdb-4.2
+GitCommit: a7100b4952e9a1f2258a1f4283d53f8dccf12d95
 Directory: percona-server-mongodb-4.2
 File: Dockerfile