Build(image): always update package (backport #230)

[mergify]

Which issue(s) this PR fixes:

Issue longhorn/longhorn#8721

What this PR does / why we need it:

Integrate package updates into the image build process. This reduces noise from irrelevant vulnerabilities, making the report more focused for Longhorn.

Special notes for your reviewer:

None

Additional documentation or context

None

---

This is an automatic backport of pull request #230 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 84e8b7b has failed:

On branch mergify/bp/v1.6.x/pr-230
Your branch is up to date with 'origin/v1.6.x'.

You are currently cherry-picking commit 84e8b7b.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   package/Dockerfile

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[c3y1huang]

Ref longhorn/longhorn#8722