fix(cover): Fix linkFullImages 404 not found

[MortalHappiness]

What does this PR change? What problem does it solve?

See the description in the corresponding issue for details.

This PR changes (path.Join .RelPermalink .Params.cover.image) to (.Params.cover.image) solves the problem. However, I don't know the original context of why .RelPermalink is needed. Please tell me if there are any better ways to solve this problem. Thanks for the reviewers.

Was the change discussed in an issue or in the Discussions before?

Resolves: #1565

PR Checklist

• This change adds/updates translations and I have used the template present here.
• I have enabled maintainer edits for this PR.
• I have verified that the code works as described/as intended.
• This change adds a Social Icon which has a permissive license to use it.
• This change does not include any CDN resources/links.
• This change does not include any unrelated scripts such as bash and python scripts.
• This change updates the overridden internal templates from HUGO's repository.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud