Add tag refs to nbgv publicReleaseRefSpec

[corinagum]

Summary

• CD pipeline triggered from a v* tag was producing 2.0.7.1 instead of 2.0.7 because Nerdbank.GitVersioning did not treat tag refs as public releases
• Adds ^refs/tags/v\d+(?:\.\d+(?:\.\d+)?)?$ to publicReleaseRefSpec in version.json so builds from tags like v2.0.7 get a clean three-part NuGet version

Test plan

• Trigger CD publish pipeline from a v* tag and confirm the produced NuGet package version is 2.0.x (no trailing .1)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds a tag ref pattern to nbgv's publicReleaseRefSpec so CD builds triggered from v* tags produce clean three-part NuGet versions instead of appending a height suffix.

Changes:

• Append ^refs/tags/v\d+(?:\.\d+(?:\.\d+)?)?$ to publicReleaseRefSpec in version.json.

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[corinagum]

False alarm - ADO confused me.