fix(ci): align go directive to estate 1.26.1 so setup-go uses host Go
CI check failed because go.mod declared 'go 1.25.0' — the only repo not on the host's 1.26.x line. actions/setup-go then tried to download 1.25.0 on the self-hosted runner (fails), while cobalt (1.26.1) and template-go-agent (1.26) serve from the host/cache. Deps need >=1.25, so 1.26.1 satisfies them and matches the estate.
This commit is contained in: