Break out this curl command into separate lines

[CdrMarks]

Summary

Install - Break out a complex curl command, with a curl command nested within, into separate lines.

I saw this in pantheon-systems/terminus-build-tools-plugin#427 and felt it would be good to update it here too.

Dependencies and Timing

Release:

• When ready

---

Post Launch

Do not remove - To be completed by the docs team upon merge:

• Redirect /docs/old-path/ => /docs/new-path/ (if applicable)
• Include/exclude pages ^ respectively within docs search service provider (if applicable)
• For Heroes - add a props post to the discussion board.
• Remove from the project board

[pantheondocs]

Lighthouse Audit Results:

Description	Live	pr-7031	Difference
Performance Score	49	50	1
Best Practice Score	79	79	0
SEO Score	96	96	0
Accessibility Score	96	96	0

Lighthouse Audit Reports:

• pr-7031 HTML Report
• Pantheon Docs HTML Report

Preview Environment

[whitneymeredith]

LGTM