Follow-up from "Fix style and language issues in Elasticsearch page"

The following discussions from !69743 (merged) should be addressed:

@aqualls started a discussion:

I'd like you to take another try at these lines. Can we get rid of the bolding, and the This is? I suspect the last two sentences can be combined and rewritten for clarity.
@aqualls started a discussion:
Consider:
```
The search index updates after you:

- Add data to the database or repository.
- [Enable Elasticsearch](#enable-advanced-search) in the Admin Area.
```
This sentence stood out because of the passive voice: is added, is enabled, is updated. When you see lots of is is is, look for a way to rewrite it in active voice.

Active voice can help here:

This document describes how to enable Advanced Search. When enabled, Advanced Search
provides you:

- Faster search response times.
- Improved [search features](../user/search/advanced_search.md).

(is enabled, you'll have etc)

@aqualls started a discussion: (+1 comment)
@fneill I'm partway through the document, and I think I need to pause to ask some questions about your intent before I proceed. I may be attempting a harder edit than you truly needed or wanted. Are you attempting a full cleanup, or just workflow practice? I ask because there are 100+ Vale suggestions for this page. They're relatively easy to implement, BUT if you're looking to practice process, I should stop my edits here.

If what you intend is to get MR practice, then I do not want to punish you by adding in a full edit. Instead, let's keep your work (and my edits!) an MVC, and get it out the door:
1. You can choose to take or leave the first suggestions I've made
2. Practice using the thread I'm making right here, to create a new follow-up issue for you
3. Ask @kpaizee to approve / merge this MR during your working hours so you can keep going
4. Make another round of revisions in a follow-up MR, and send it my way. I'm 100% on board with the idea of doing multiple MVCs on a change so you can get used to the manner of working merge requests, and I'm happy to look at those overnight for you.
Lastly - I'm pretty sure this was more than a tw-weight1 of effort. This feels more like a tw-weight5 given the changes span multiple subheadings on a single page AND correct a few inbound links.