chore: align go version from upstream repositories

[github-actions]

Keep Go versions in sync with upstream repositories.

[thaJeztah]

Argh this is wrong; they merged with .0 as version, so now we'd be building with vulnerabilities? I left a comment, but looks like that was ignored; containerd/containerd#13090

[thaJeztah]

Opened a PR;

• update to go1.26.1 containerd/containerd#13145

[crazy-max]

We still need this to be merged though, see failures in other PRs: https://github.com/docker/packaging/actions/runs/24047483914/job/70134466123?pr=395#step:7:1741

 2.510 go: downloading golang.org/x/text v0.32.0
4.713 + bin/gen-manpages
4.713 go build  -gcflags=-trimpath=/go/src -buildmode=pie  -o bin/gen-manpages -ldflags '-X github.com/containerd/containerd/v2/version.Version=v2.3.0-beta.0-119-ge373060a9 -X github.com/containerd/containerd/v2/version.Revision=e373060a953aeaa35554e2f667043fed73ff6248 -X github.com/containerd/containerd/v2/version.Package=github.com/containerd/containerd/v2 -s -w ' -tags ""  ./cmd/gen-manpages
4.718 go: go.mod requires go >= 1.26.0 (running go 1.25.8; GOTOOLCHAIN=local)
4.718 make: *** [Makefile:268: bin/gen-manpages] Error 1
4.719 error: 
4.719 
4.719 RPM build errors:
4.719 Bad exit status from /var/tmp/rpm-tmp.Y1N6Q6 (%build)
4.719     Bad exit status from /var/tmp/rpm-tmp.Y1N6Q6 (%build)
------

[thaJeztah]

Ah, yes, I was hoping for my PR to be trivial and merged fast, but looks like it wasn't yet 😞

[crazy-max]

Pushed extra commit to fix https://github.com/docker/packaging/actions/runs/23843956397/job/69543962188?pr=394

#38 4.853 go build  -gcflags=-trimpath=/go/src  -o bin/containerd -ldflags '-X github.com/containerd/containerd/v2/version.Version=v0.0.0-20260401043938-e78d26e -X github.com/containerd/containerd/v2/version.Revision=e78d26ee127caf5fc67de1626f3b81d095dda1fb -X github.com/containerd/containerd/v2/version.Package=github.com/containerd/containerd/v2 -s -w -extldflags "-static" ' -tags "urfave_cli_no_docs osusergo netgo static_build"  ./cmd/containerd
#38 4.856 go: unsupported GOOS/GOARCH pair windows/arm
#38 4.857 make: *** [Makefile:263: bin/containerd] Error 2

[crazy-max]

Merged to unblock ci. It's fine to have it, we don't ship packages from default branch anyway but tagged releases.