Remove the hover text-decoration transition in `InlineLink`, `Accordion`, `Timeline` and align `Prose` with the updated `InlineLink` styles

[stamat]

Summary

We can't animate the text-decoration-thickness, we can animate a border, but since this is 1px transition, transitioning it is practically useless. Tested it on dotcom.

List of notable changes:

• *removed transition: var(--brand-InlineLink-transition-timing) text-decoration; from InlineLink styles.
• *removed transition: var(--brand-InlineLink-transition-timing) text-decoration; from Accordion styles.
• *removed transition: var(--brand-InlineLink-transition-timing) text-decoration; from Timeline styles.
• Aligned Prose inline link styles with the rest, since the animation didn't work anyways.

What should reviewers focus on?

• Hover effect on InlineLink

Steps to test:

Supporting resources (related issues, external links, etc):

• https://github.com/github/github/pull/359872

Contributor checklist:

• [ ] All new and existing CI checks pass
• [ ] Tests prove that the feature works and covers both happy and unhappy paths
• [ ] Any drop in coverage, breaking changes or regressions have been documented above
• [ ] UI Changes contain new visual snapshots (generated by adding update snapshots label to the PR)
• [ ] All developer debugging and non-functional logging has been removed
• [ ] Related issues have been referenced in the PR description

Reviewer checklist:

• [ ] Check that pull request and proposed changes adhere to our contribution guidelines and code of conduct
• [ ] Check that tests prove the feature works and covers both happy and unhappy paths
• [ ] Check that there aren't other open Pull Requests for the same update/change

Screenshots:

Please try to provide before and after screenshots or videos

Before	After

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: fa028d211ec3b613962e0ad756cef89464149acf

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@primer/brand-primitives	Patch
@primer/react-brand	Patch
@primer/brand-e2e	Patch
@primer/brand-fonts	Patch
@primer/brand-config	Patch
@primer/brand-storybook	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions[bot]]

🟢 No design token changes found

[github-actions[bot]]

⚠️ Visual differences found

Our visual comparison tests found UI differences.

Please review the differences by using the test artifacts to ensure that the changes were intentional.

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Review visual differences

[rezrah]

Thanks for tidying up the InlineLink component @stamat ✨ 🧹

Before we merge this, a few things to add...

• We'll need a changeset
• We should remove the base.json token file which declares the underlying token
• Optional (but better to do it in this single PR): We should also remove the same CSS rules from the other components that use this InlineLink style, which are Accordion, Prose and Timeline

[stamat]

@rezrah yo, I don't know what does this mean: We should remove the base.json token file which declares the underlying token 🤷

[stamat]

@rezrah ah I see I see, the design token for the variable right?