Update limitations page to warn users that naming a gateway with the same name as a container causes an error

[jasonviviano]

What content needs to be created or modified?

The known limitations page

Describe the solution you'd like

Add a warning for users on the steps that lead to this error

Additional context

• Bug filed: https://github.com/radius-project/radius/issues/7149

AB#11141

[azure-boards[bot]]

✅ Successfully linked to Azure Boards work item(s):

• GitHub Issue 11141

[jasonviviano]

PR merged