[percona] Update psmdb-42 version

library/percona

@@ -21,8 +21,8 @@ GitCommit: fc7952f19d7e3e55477a9baee2f6d4d1092431f6
 Directory: percona-server.56
 File: Dockerfile-dockerhub
 
-Tags: psmdb-4.2.5, psmdb-4.2
-GitCommit: 6903b47a358002083d7cd6da28f67f7692e83591
+Tags: psmdb-4.2.6, psmdb-4.2
+GitCommit: c1b9ca0e068093c6eec7c85816f9d49e0b0b4a6a
 Directory: percona-server-mongodb.42
 File: Dockerfile