ci: fix ui build workflow

[ck-c8y]

fix for issue #121

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
30	0	0	30	100	6m39.430583999s

Passed Tests

Name	⏱️ Duration	Suite
Get Container Logs	5.058 s	Container-Logs
Get Container Logs with only last N lines	0.519 s	Container-Logs
Remove Container	6.226 s	Container-Remove
Remove Container Non Existent Container Should Not Through An Error	0.062 s	Container-Remove
Update to tedge-container-plugin-ng	23.697 s	Installation
Check for Update	3.959 s	Operations-Clone
Clone Existing Container	25.172 s	Operations-Clone
Clone Existing Container by Timeout Whilst Waiting For Exit	17.788 s	Operations-Clone
Clone Existing Container but Waiting For Exit	24.999 s	Operations-Clone
Ignore Containers With Given Label	20.927 s	Operations-Clone
Install/uninstall container package from private repository - credentials file	12.727 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script	12.953 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script with cache	17.739 s	Operations-Private-Registries
Install/uninstall container package from private repository - engine credentials	14.450 s	Operations-Private-Registries
Install/uninstall container package from private repository - docker from docker	34.284 s	Operations-Private-Registries
Get Configuration	4.878 s	Operations
Install/uninstall container-group package	13.881 s	Operations
Install invalid container-group	2.659 s	Operations
Install container-group with multiple files - app1	11.407 s	Operations
Install container-group with multiple files - app2	7.312 s	Operations
Install/uninstall container package	11.755 s	Operations
Install/uninstall container package from file	8.404 s	Operations
Manual container creation/deletion	14.531 s	Operations
Manual container creation/deletion with error on run	7.204 s	Operations
Manual container created and then killed	9.537 s	Operations
Self Update Is Present Using Self Type	0.152 s	Self
Self Update Is Present Using Container Type	0.152 s	Self
Self Update Is Not Present	0.154 s	Self
Service status	17.101 s	Telemetry-Main
Sends measurements	69.742 s	Telemetry-Main