Add Github release workflow

[hsubox76]

Add a workflow to run a github release when a release tag is pushed to the repo by release.yml.

I could have added this as a step in release.yml but it's a lot easier and less error-prone to get the tag name this way (when triggered by a tag push, the tag is the github.ref_name)

[changeset-bot]

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Latest commit: 30b6c6e

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[lahirumaramba]

Thanks!