fix: default to localized date formatting

[David-Guillot]

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

On a multilingual blog with translated posts, a non-English post displays an English-formatted non-English date like
juillet 8, 2024 instead of 8 juillet 2024 as it should be for French.

This PR changes the post_meta partial template to leverage Hugo's time.Format function's preset formats. I have chosen :date_long since it's the one that was hard-coded here before.

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

Nope, I just discovered this behavior and considered it a bug, so I just took the liberty of opening a PR. This PR fixes the same problem as #1111 though, but without any additional code, just using native Hugo features.

And actually I just created #1611 for you to have a clear view on the issue. This PR fixes the issue on both places because as you know the post_meta.html template is included both in list.html and in single.html.

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.

[sonarcloud]

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