Add major.minor Docker tag to goreleaser config

[Copilot]

Adds v{{ .Major }}.{{ .Minor }} tag to Docker image releases, enabling users to pin to minor versions (e.g., v1.0) while receiving patch updates.

Changes

• Added "v{{ .Major }}.{{ .Minor }}" to dockers_v2.tags in .goreleaser.yml

On release of v1.2.3, Docker images are now tagged as:

• latest
• v1.2.3 (full version)
• v1.2 (major.minor) ← new
• v1 (major only)

PR checklist

• Read the contribution guidelines.
• Ensure your code builds and passes local testing efforts
• Link to any related issue(s)
• Comment on any outstanding items or link to issues for tracking

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• goreleaser.com
  • Triggering command: /usr/bin/curl curl -sfL REDACTED (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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