Ensure ActionMenu's itemActivated event bubbles

[camertron]

What are you trying to accomplish?

The ActionMenu's itemActivated event does not bubble, making it more difficult to use than necessary. SelectPanel, which was based on ActionMenu, also features an itemActivated event. SelectPanel's event bubbles, so ActionMenu's probably should too.

Integration

No changes necessary in production.

List the issues that this change affects.

Fixes #3269

Risk Assessment

• Low risk the change is small, highly observable, and easily rolled back.
• Medium risk changes that are isolated, reduced in scope or could impact few users. The change will not impact library availability.
• High risk changes are those that could impact customers and SLOs, low or no test coverage, low observability, or slow to rollback.

Accessibility

• No new axe scan violation - This change does not introduce any new axe scan violations.

[changeset-bot]

🦋 Changeset detected

Latest commit: af3317a

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

This PR includes changesets to release 1 package

Name	Type
@primer/view-components	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

[acbreton]

LGTM, thank you!

[langermank]

🫧