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>
4 files changed