build(deps): bump github.com/opencontainers/runc from 1.2.5 to 1.2.6

[dependabot[bot]]

Bumps github.com/opencontainers/runc from 1.2.5 to 1.2.6.

Changelog

Sourced from github.com/opencontainers/runc's changelog.

[1.2.6] - 2025-03-17

Hasta la victoria, siempre.

Fixed

• Fix a stall issue that would happen if setting O_CLOEXEC with CloseExecFrom failed (#4647).
• runc now properly handles joining time namespaces (such as with runc exec). Previously we would attempt to set the time offsets when joining, which would fail. (#4635, #4649)
• Handle EINTR retries correctly for socket-related direct golang.org/x/sys/unix system calls. (#4650)
• We no longer use F_SEAL_FUTURE_WRITE when sealing the runc binary, as it turns out this had some unfortunate bugs in older kernel versions and was never necessary in the first place. (#4651, #4640)

Removed

• Remove Fexecve helper from libcontainer/system. Runc 1.2.1 removed runc-dmz, but we forgot to remove this helper added only for that. (#4646)

Changed

• Use Go 1.23 for official builds, run CI with Go 1.24 and drop Ubuntu 20.04 from CI. We need to drop Ubuntu 20.04 from CI because Github Actions announced it's already deprecated and it will be discontinued soon. (#4648)

Commits

• e89a299 VERSION: Release 1.2.6
• b5ec91d Merge pull request #4678 from kolyshkin/1.2-4671
• b582187 .cirrus.yml: install less dependencies
• 9d0c86a Merge pull request #4668 from AkihiroSuda/cherrypick-4664-1.2
• 96f6838 CI: migrate Vagrant + Cirrus to Lima + GHA
• 4dbf9ac merge #4647 into opencontainers/runc:release-1.2
• 35d1d6e merge #4649 into opencontainers/runc:release-1.2
• 58c8c81 merge #4650 into opencontainers/runc:release-1.2
• 13d44fb Merge pull request #4651 from kolyshkin/1.2-4641
• e643905 libcontainer: Prevent startup hang when CloseExecFrom errors
• Additional commits viewable in compare view

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Superseded by #2549.