docs: add notes about podman gateway alias

[reubenmiller]

Add notes about the podman specific settings to configure the podman gateway alias.

[github-actions]

Robot Results

✅ Passed	❌ Failed	⏭️ Skipped	Total	Pass %	⏱️ Duration
19	0	1	19	100	8m43.390653s

Passed Tests

Name	⏱️ Duration	Suite
Ignore Containers Marked With A Specific Label	29.328 s	Container
Grace period to allow container to startup	5.028 s	Operations
Service is up	1.346 s	Operations
Get Logfile Request	4.755 s	Operations
Get Configuration File	5.119 s	Operations
Execute Shell Command	2.573 s	Operations
Install application using docker compose	22.353 s	Operations
Get Container Logs	4.750 s	Operations
Get Container Logs without explicit container name	5.388 s	Operations
Get Container Logs For Non-existent container	2.573 s	Operations
Update From Legacy Versions	142.726 s	Self-Update-Compat
Trigger self update via local command	26.366 s	Self-Update
Self update should only update if there is a new image	22.555 s	Self-Update
Self update using software update operation	107.595 s	Self-Update
Rollback when trying to install a non-tedge based image	23.961 s	Self-Update
Self update using software update operation using Container type	113.638 s	Self-Update
Cloud Connection is Online	0.215 s	Telemetry
Service status	0.371 s	Telemetry
Sends measurements	2.726 s	Telemetry