Upgrade Go version to 1.26.2

[github-actions]

Upgrade Go version to 1.26.2:
https://go.dev/doc/devel/release

• Set PR as "Ready for review"
• Check CI
• Submit PR review

[github-actions]

Overview

Image reference	score-helm:latest	score-helm:latest
- digest	fb9804a6dcf8	befa029c1d40
- tag	latest	latest
- provenance	bd88333	354143a
- vulnerabilities
- platform	linux/amd64	linux/amd64
- size	3.7 MB	3.7 MB (+8.6 kB)
- packages	23	23

Policies (0 improved, 0 worsened)

Policy Name	score-helm:latest	score-helm: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No outdated base images	✅	✅		No Change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 (4 package changes and 0 vulnerability changes)

• ♾️ 4 packages changed
• 19 packages unchanged

Changes for packages of type golang (4 changes)

	Package	Version score-helm:latest	Version score-helm:latest
♾️	github.com/masterminds/semver/v3	3.3.0	3.4.0
♾️	github.com/score-spec/score-helm	0.10.0	0.10.1-0.20260409014415-354143ac2d6a
♾️	github.com/spf13/cast	1.7.0	1.10.0
♾️	golang.org/x/crypto	0.45.0	0.49.0