fix(docs-infra) code example in 'usage notes' tab is shrunk

[dnlrbz]

Fixes that docs details tabs that are not API reference are shrunk and not have full available width

Fixes #52818

PR Checklist

Please check if your PR fulfills the following requirements:

• [x ] The commit message follows our guidelines: https://github.com/angular/angular/blob/main/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• [ x] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ x] Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• angular.io application / infrastructure changes
• Other... Please describe:

What is the current behavior?

Currently, the non-API tabs in the new docs are shrunk and not taking will available width.

Issue Number: 52818

What is the new behavior?

Docs tabs take full available width, so that example code is visible.

Does this PR introduce a breaking change?

• Yes
• [ x] No

Other information

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