docs: link image digest to CNCF glossary

[iacker]

Summary

• replace the plain image digest mention with a link to the CNCF glossary definition
• align the container images concept page with the maintainer guidance in the linked issue

Validation

• independent content review of the change
• confirmed the CNCF glossary PR for the term is open: Add image digest glossary term cncf/glossary#3627

Fixes #55017

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[Arhell]

Lgtm

[CodesbyUnnati]

LGTM

[Okabe-Junya]

/lgtm
/hold
(on behalf of cncf/glossary maintainer)

Let's unhold once cncf/glossary#3627 merged

[k8s-ci-robot]

LGTM label has been added.

Details

Git tree hash: 8da8d79e3393e620a66df840775d997c25a223e8

[Okabe-Junya]

/assign reylejano

[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all PRs.

This bot triages PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the PR is closed

You can:

• Mark this PR as fresh with /remove-lifecycle stale
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/lifecycle stale

[iacker]

/remove-lifecycle stale
Still blocked on cncf/glossary#3627 (dependency PR remains open), so I'm refreshing this PR rather than letting it rot.

[SergeyKanzhelev]

/sig docs

[Okabe-Junya]

/remove-lifecycle stale Still blocked on cncf/glossary#3627 (dependency PR remains open), so I'm refreshing this PR rather than letting it rot.

Thank you,

@VarshaUN

Friendly reminder, still on it?
(If I'll not get any response in next week , plan to ask other reviewers if it'd be okay for me to move forward with that PR as the maintainer

[VarshaUN]

/remove-lifecycle stale Still blocked on cncf/glossary#3627 (dependency PR remains open), so I'm refreshing this PR rather than letting it rot.

Thank you,

@VarshaUN

Friendly reminder, still on it? (If I'll not get any response in next week , plan to ask other reviewers if it'd be okay for me to move forward with that PR as the maintainer

Hey sure , I missed this notification , I have updated the PR now

[iacker]

Closing this, I am not going to follow up on it.