Release plan for 3.0.4

[AlbertoBarba]

Is there any plan to tag version 3.0.4?
3.0.3 has been tagged the last December and main branch contains different useful changes (EG: #321)
@AkihiroSuda

[AkihiroSuda]

The CI has to be fixed before making a release

• CI: lint is failing #351

[AkihiroSuda]

Let's bump up go.mod too

• go.mod: bump up #353

[AkihiroSuda]

https://github.com/containerd/cgroups/releases/tag/v3.0.4

[AlbertoBarba]

Thanks @AkihiroSuda