fix: run release builder by default

[dareste]

Proposed changes

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[Copilot]

Pull Request Overview

This PR modifies the GitHub Actions release builder workflow to change the default build behavior. Instead of only running builds for releases tagged with '-krew', the workflow will now run for all releases except those tagged with '-docker'.

• Changed the conditional logic in the release builder workflow from positive matching to negative matching

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[mrajagopal]

All good.