docs(common): fix FormatWidth.Short description

[garrettld]

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

PR Type

What kind of change does this PR introduce?

• [x] Documentation content changes

What is the current behavior?

The formatting for FormatWidth.Short is messed up:

What is the new behavior?

The formatting for FormatWidth.Short is consistent with other FormatWidth descriptions:

Does this PR introduce a breaking change?

• [x] No

Other information

[JeanMeche]

caretaker: this is a doc only change, my approve is enough.

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