Wrong autoupdater postgresql pattern

Description

When autoupdater tries to find new version of postgresql container it finds wrong version .6.

Proposal

Somehow cocrrect the pattern

Relevant logs from Rundeck run

| 08:03:50 | 2020-09-04 06:03:50,963 [INFO]: Updating project "ansible-roles/rundeck"                           |
|----------|----------------------------------------------------------------------------------------------------|
| 08:03:53 | 2020-09-04 06:03:53,347 [INFO]: Package "ansible-roles/docker" is up-to-date: 4.2.0                |
| 08:03:53 | 2020-09-04 06:03:53,544 [INFO]: Package "ansible-roles/service" is up-to-date: 1.5.2               |
| 08:03:53 | 2020-09-04 06:03:53,803 [INFO]: Package "docker/pipeline-worker" is up-to-date: 20.04              |
| 08:03:54 | 2020-09-04 06:03:54,425 [INFO]: Package "docker/rundeck" is up-to-date: 3.2.5                      |
| 08:03:56 | 2020-09-04 06:03:55,943 [INFO]: Update available for package "docker/sameersbn/postgresql":  -> .6 |

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