theme: use 16px font for alert descriptions

[wackerow]

Description

Proposal: Use 16px font size as default for ui/alert component

Example screenshot

Preview link

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https://ethereum.org/en/get-eth

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[pettinarip]

Approving but this needs Design approval as well.

cc @nloureiro @konopkja

Here is the Storybook where you can see the new Alerts with the font size change
https://63b7ea99632763723c7f4d6b-aaqognawns.chromatic.com/?path=/story/molecules-action-feedback-alerts--variants

Now both, the Title and Description, have 16px. I think I would prefer to keep the Title a bit bigger in size, maybe 18px?

[nloureiro]

Approving but this needs Design approval as well.

cc @nloureiro @konopkja

Here is the Storybook where you can see the new Alerts with the font size change https://63b7ea99632763723c7f4d6b-aaqognawns.chromatic.com/?path=/story/molecules-action-feedback-alerts--variants

Now both, the Title and Description, have 16px. I think I would prefer to keep the Title a bit bigger in size, maybe 18px?

This is what I have on the DS > The only difference is that the yellow one uses the default (body) text color on all the text. For contrast purposes.

[nloureiro]

@wackerow one more thing based on your feedback on figma > bump the text to 16px

[wackerow]

Okay. That is the only change in this PR (16px font); was not meant to address anything color related. If that looks good to you @nloureiro do me a favor and slap an approval on here 😄

[wackerow]

(For the content of our ui/alert component)