fix(rux-tabs) resolve small tabbing issue

[kiley-mitti]

Brief Description

There was an issue with tabbing when the first tab was selected out of the box. See: https://codepen.io/rocketmark/pen/poqLVLW

This resolves that.

Related Issue

General Notes

Motivation and Context

This resolves a tabbing bug accidentally added last update.

Issues and Limitations

Types of changes

• [x] Bug fix
• [ ] New feature
• [ ] Breaking change

Checklist

• [ ] This PR adds or removes a Storybook story.
• [ ] I have added tests to cover my changes.
• [x] Regressions are passing and/or failures are documented
• [x] Changes have been checked in evergreen browsers

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: c97e80d4a939fa0e1d3cf4782c37a0361f2c0210

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

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