update go to 1.25.12 https://access.redhat.com/security/cve/cve-2026-39822 BUG=b/535178269 TEST=presubmit RELEASE_NOTE=Update dev-lang/go to 1.25.12. cos-patch: security-high Change-Id: I78aa00733d388e3760fd6a221ea0cde783313f62 Reviewed-on: https://cos-review.googlesource.com/c/third_party/overlays/chromiumos-overlay/+/180346 Reviewed-by: Kevin Berry <kpberry@google.com> Main-Branch-Verified: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com> Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>