Library Intro Card- Typography Issues

[kattyode]

The following issues were identified in the Library Intro Card:

1. The secondary text font color differs from Figma.

Staging:

Figma:

This issue is also present in dark mode.

2. The letter spacing and line height of the author name differ from Figma.

Staging:

Figma:

[kattyode]

QA Validation note: Passed

Validated on: https://www.cppal-dev.boost.org/v3/demo/components/#library-intro-card
The fixes are working as expected:

1. The secondary text font color now matches Figma, including in dark mode.