fix: fix typo in the container-image setting name in a log message

[reubenmiller]

Fix a small typo which directed the user to the wrong container-image setting to activate the sm-plugin (it used - instead of _).

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
38	0	0	38	100	9m33.823694999s

Passed Tests

Name	⏱️ Duration	Suite
Get Container Logs	6.322 s	Container-Logs
Get Container Logs with only last N lines	0.597 s	Container-Logs
Get Container Logs By Operation	8.091 s	Container-Logs
Remove Container	7.808 s	Container-Remove
Remove Container Non Existent Container Should Not Through An Error	0.114 s	Container-Remove
Restart Container	0.628 s	Container-Restart
Restart Unknown Container Fails	0.108 s	Container-Restart
Update to tedge-container-plugin-ng	25.511 s	Installation
Check for Update	9.017 s	Operations-Clone
Clone Existing Container	26.036 s	Operations-Clone
Clone Existing Container by Timeout Whilst Waiting For Exit	18.561 s	Operations-Clone
Clone Existing Container but Waiting For Exit	24.496 s	Operations-Clone
Ignore Containers With Given Label	21.326 s	Operations-Clone
Install/uninstall container-image	20.486 s	Operations-Container-Image
Install/uninstall not existent container image	9.321 s	Operations-Container-Image
Install/uninstall container package from private repository - credentials file	17.645 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script	17.486 s	Operations-Private-Registries
Install/uninstall container package from private repository - credentials script with cache	24.558 s	Operations-Private-Registries
Install/uninstall container package from private repository - engine credentials	19.036 s	Operations-Private-Registries
Install/uninstall container package from private repository - docker from docker	49.643 s	Operations-Private-Registries
Get Configuration	5.517 s	Operations
Install/uninstall container-group package	18.579 s	Operations
Install/uninstall container-group package with non-existent image	11.605 s	Operations
Install invalid container-group	3.724 s	Operations
Install container-group with multiple files - app1	17.156 s	Operations
Install container-group with multiple files - app2	10.680 s	Operations
Install/uninstall container package	21.380 s	Operations
Install/uninstall container package from file	13.232 s	Operations
Manual container creation/deletion	23.830 s	Operations
Manual container creation/deletion with error on run	8.161 s	Operations
Manual container created and then killed	11.320 s	Operations
Remove Orphaned Cloud Services	20.967 s	Operations
Install container group that uses host volume mount	8.599 s	Operations
Self Update Is Present Using Self Type	0.200 s	Self
Self Update Is Present Using Container Type	0.216 s	Self
Self Update Is Not Present	0.212 s	Self
Service status	18.901 s	Telemetry-Main
Sends measurements	72.756 s	Telemetry-Main