Autodevops docs chevron icon migration

What does this MR do and why?

A small MVC for Migrate angle icon to chevron in doc/topics/aut... (#362776 - closed) to migrate the angle icon to chevron in doc/topics/autodevops/quick_start_guide.md.

Screenshots or screen recordings

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How to set up and validate locally

N/A

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Closes #362776 (closed)