Adjustments to CH9 of WebOps certification

[jkudish]

Summary

Chapter 9: Additional Automation

• Remove "final" chapter in CH9 of WebOps certification. It's not the final chapter, there's one more after this.
• Update wording from "three" automation tools to "two" since only two are discussed in this chapter.
• Fix typo: missing "as"

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Post Launch

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

• Redirect /old-path/ => /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

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[stevector]

Thanks @jkudish!!