replay: bump testify to 1.12.1

[jadoonf]

Fork-only replay of cli#14204.

The reviewed diff is the original go.mod/go.sum update. The base branch carries the measurement overlay and is excluded from this PR diff. Garnet records module download and targeted dependency use on the exact head. No upstream writes or claims of upstream deployment.

[garnet-runtime-review]

Execution Profiles recorded for 1 job, triggered by 4e3b514

10 destinations
_{recorded at the kernel by Garnet · 2026-08-22 04:43 UTC}

Garnet Dependency Replay / go-modules ↗ · 10 destinations

Runner.Worker
├─ node
│ ├─ dash
│ │ └─ go
│ │ └─ ○ sum.golang[.]org
│ ├─ ○ api.github[.]com
│ ├─ ○ github[.]com
│ └─ ○ release-assets.githubusercontent[.]com
└─ bash
└─ go
├─ ○ proxy.golang[.]org
└─ ○ storage.googleapis[.]com
systemd
├─ hosted-compute-
│ ├─ ○ 140.82.114.24
│ ├─ ○ glb-2a3c35-public-internal.githubapp[.]com (github infra)
│ └─ ○ localhost (dns resolver)
└─ systemd-network
└─ ○ ip6-allrouters

_{View this job's Execution Profile in Garnet →}

---

_{💡 How to read this}

Runner.Worker ← process on a path
└─ npm
└─ node← process that acted
└─ ○ npmjs[.]org ← observed action

_{follow a path downward to see what ran and what it did — each path to an observed action is an execution chain}

_{names on the path = processes · ○ = observed action · (…) = context}