fix(docker): run "go mod vendor" to fix vendoring issue

[machi1990]

Fix CI run
https://github.com/bf2fc6cc711aee1a0c2a/kas-fleet-manager/runs/5446371161?check_suite_focus=true
following #831

Description

Verification Steps

Checklist (Definition of Done)

• All acceptance criteria specified in JIRA have been completed
• Unit and integration tests added that prove the fix is effective or the feature works (tested against emulated and non-emulated OCM environment)
• Documentation added for the feature
• CI and all relevant tests are passing
• Code Review completed
• Verified independently by reviewer
• Required metrics/dashboards/alerts have been added (or PR created).
• Required Standard Operating Procedure (SOP) is added.
• JIRA has created for changes required on the client side

[machi1990]

Getting this in to fix the broken pipeline.

[VanillaSpoon]

lgtm @machi1990 :)