chore: fix trigger for artifacts (#172)

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## Overview/Summary

Fixes the trigger for publishing release artifacts

## This PR fixes/adds/changes/removes

N/A

### Breaking Changes

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## Testing Evidence

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works/fixes as described and planned (include screenshots, if
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## As part of this Pull Request I have

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Requests](https://github.com/Azure/alz-terraform-accelerator/pulls)
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[issues](https://github.com/Azure/alz-terraform-accelerator/issues), for
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.github/workflows/release.yml

@@ -3,7 +3,7 @@ name: Release
 
 on:
   release:
-    types: [created]
+    types: [published]
   workflow_dispatch:
   pull_request:
     branches: