updating README for pipeline changes
-**Concourse Pipeline** [![Concourse Build Status](https://prod.ci.gpdb.pivotal.io/api/v1/teams/main/pipelines/gpdb_master/badge)](https://gpdb.data.pivotal.ci/teams/gpdb) |
+**Concourse Pipeline** [![Concourse Build Status](https://prod.ci.gpdb.pivotal.io/api/v1/teams/main/pipelines/gpdb_master/badge)](https://prod.ci.gpdb.pivotal.io/teams/main/pipelines/gpdb_master) |
**Travis Build** [![Travis Build Status](https://travis-ci.org/greenplum-db/gpdb.svg?branch=master)](https://travis-ci.org/greenplum-db/gpdb)
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