fix: update GitHub Actions dependencies

[javi11]

Summary

Fixes the GitHub Actions release workflow errors caused by outdated dependencies.

Changes

• Updated mlugg/setup-zig from v1 to v2
• Set explicit Zig version to 0.13.0 (stable, available version)
• Fixed Go version from 1.24.0 to 1.24 (1.24.0 doesn't exist yet)

Problem Solved

Resolves the 404/503 errors when downloading Zig 0.15.2 from mirrors:

• The v1 action was trying to fetch an unavailable Zig version
• The v2 action has better mirror selection and fallback mechanisms
• Using a stable Zig version (0.13.0) ensures availability

Testing

The workflow should now pass without mirror errors.