Add workflow to upgrade Go version

[mathieu-benoit]

This workflow allows users to upgrade the Go version and create a pull request with the changes.

[github-actions]

Overview

Image reference	score-compose:latest	score-compose:latest
- digest	cf3457095b96	cb8221e68493
- tag	latest	latest
- provenance	2946174	17453dc
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	6.3 MB	6.3 MB (+3 B)
- packages	55	55

Policies (0 improved, 0 worsened)

Policy Name	score-compose:latest	score-compose:latest	Change	Standing
Default non-root user	✅	✅		No Change
No AGPL v3 licenses	✅	✅		No Change
No fixable critical or high vulnerabilities	✅	✅		No Change
No high-profile vulnerabilities	✅	✅		No Change
No outdated base images	✅	✅		No Change
No unapproved base images	✅	✅		No Change
Supply chain attestations	✅	✅		No Change
Valid Docker Hardened Image (DHI) or DHI base image	⚠️ 2	⚠️ 2		No Change

Packages and Vulnerabilities (1 package changes and 0 vulnerability changes)

• ♾️ 1 packages changed
• 54 packages unchanged

Changes for packages of type golang (1 changes)

	Package	Version score-compose:latest	Version score-compose:latest
♾️	github.com/score-spec/score-compose	0.0.0-20260308170339-2946174995cd+dirty	0.0.0-20260308223344-17453dc2e476+dirty