alert variable update

[jensheerin]

Overview/Summary

Replace this with a brief description of what this Pull Request fixes, changes, etc.

This PR fixes/adds/changes/removes

1. Fix email address to a variable *

Breaking Changes

N/A

Testing Evidence

Replace this with any testing evidence to show that your Pull Request works/fixes as described and planned (include screenshots, if appropriate).

As part of this Pull Request I have

• [x ] Read the Contribution Guide and ensured this PR is compliant with the guide
• [x ] Ensured the resource API versions in .bicep file/s I am adding/editing are using the latest API version possible
• [x ] Checked for duplicate Pull Requests
• [x ] Associated it with relevant GitHub Issues
• [x ] (AVD LZA Team Only) Associated it with relevant ADO Items
• [x ] Ensured my code/branch is up-to-date with the latest changes in the main branch
• [x ] Performed testing and provided evidence.
• [x] Updated relevant and associated documentation (e.g. Contribution Guide, Module READMEs, Docs etc.)

[danycontre]

@jensheerin thanks for your contribution.