docs(workshop): add re-establish command

[charliedmcb]

Fixes #

Description

Adding a re-establish command for getting the env vars back for MSI, and cluster creation

How was this change tested? Testing in cloud shell *

Does this change impact docs?

• [x] Yes, PR includes docs updates
• [ ] Yes, issue opened: #
• [ ] No

Release Note

NONE

[coveralls]

Pull Request Test Coverage Report for Build 11841884748

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 94.229%

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Totals
Change from base Build 11832920084:	0.0%
Covered Lines:	37147
Relevant Lines:	39422

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💛 - Coveralls