[PP-1] Update production JavaScript dependencies to latest minors

Problem/Motivation

Noticed as I was working on #3278163: yarn upgrade for latest security vulnerabilities that shepherd.js, sortablejs, and tabbable have shipped new minor releases.

Proposed resolution

After #3278163: yarn upgrade for latest security vulnerabilities, update shepherd.js, sortablejs, and tabbable to latest minors for 9.4.x and upwards.

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet