Display Multiple Authors Correctly on Blog Post

[chandans1316]

Issue

Fixes: https://merative.atlassian.net/browse/MERATIVE-957

Description

On a blog post on desktop, if there are three authors on a post, the author block goes over the edge of the screen.

Test URLs

• Before (Changes from main): https://main--merative2--hlxsites.hlx.page/drafts/Keith/3-author-blog
• After (Changes from this PR): https://issue-957-multiple-authors--merative2--hlxsites.hlx.page/drafts/Keith/3-author-blog

Test Description

Instead of being on the same row, a third or fourth author should display on a new line, aligned with the first two authors.

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Commits

* [5c1b476](https://github.com/hlxsites/merative2/commit/5c1b476233916e2a2877a94af32577678d8bc535) :white_check_mark: (latest)

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/drafts/Keith/3-author-blog