azurerm_container_app - fix validation for container app name and container names

[dylan8902]

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Description

Fixes validation regex for container app names and container names.

PR Checklist

• I have followed the guidelines in our Contributing Documentation.
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Change Log

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This is a (please select all that apply):

• Bug Fix
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• Enhancement
• Breaking Change

Related Issue(s)

Fixes #24591

Note

If this PR changes meaningfully during the course of review please update the title and description as required.

[stephybun]

Thanks @dylan8902 LGTM 👍

My bad, formatting needs to be fixed first

[dylan8902]

@stephybun - no sorry my bad. Ran the linter now

[stephybun]

Thanks @dylan8902 LGTM 🎉