swap out js3 sprint 1 & 2 for improved versions

[Dedekind561]

What does this change?

Module: JS3
Week(s): 1 & 2

Checklist

• I have read the contributing guidelines
• I have checked my spelling and grammar with an automated tool
• I have previewed my changes to check the markdown renders as I intend
• I have run my code to check it works
• My changes follow our Style Guide

Description

Point to latest step through prep workshops

Who needs to know about this?

[netlify]

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[SallyMcGrath]

LGTM