Bump `@capsizecss/metrics` to 3.4.0 for Geist Google Font (#72746)
### Why?
`next/font` depends on the Google Fonts metrics from the
`@capsizecss/metrics`. Added support for Geist at
https://github.com/seek-oss/capsize/pull/217, so we update version.
### How?
- Bump `@capsizecss/metrics` to 3.4.0
- Update the test to match the metrics.
#### Bonus
- Modified the test to use `.toMatchInlineSnapshot` to identify and
update future changes more easily.
### RFC
The `@capsizecss` team is planning to [automate the updating
process](https://github.com/seek-oss/capsize/pull/217#pullrequestreview-2431209858).
Should we continue to depend on them or replace them with our custom
script to fetch Google Font API (requires API key)?
x-ref: https://github.com/vercel/next.js/issues/47115
x-ref: [Twitter
Feedback](https://x.com/illyism/status/1855500917589602706)