fix: upgrade Go to 1.26.0 to resolve CVE-2025-68121#8884

WSandboxedOCCodeBot wants to merge 1 commit intoknative:mainknative/eventing:mainfrom

WSandboxedOCCodeBot:fix/go-1.26-upgradeWSandboxedOCCodeBot/eventing:fix/go-1.26-upgradeCopy head branch name to clipboard