fix(docs): correct explanation of sum expression for order_total (#…

…4522)

## What are you changing in this pull request and why?
<!---
Describe your changes and why you're making them. If linked to an open
issue or a pull request on dbt Core, then link to them here! 

To learn more about the writing conventions used in the dbt Labs docs,
see the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md).
-->

## Checklist
<!--
Uncomment if you're publishing docs for a prerelease version of dbt
(delete if not applicable):
- [ ] Add versioning components, as described in [Versioning
Docs](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-entire-pages)
- [ ] Add a note to the prerelease version [Migration
Guide](https://github.com/dbt-labs/docs.getdbt.com/tree/current/website/docs/docs/dbt-versions/core-upgrade)
-->
- [x] Review the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
so my content adheres to these guidelines.
- [x] For [docs
versioning](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#about-versioning),
review how to [version a whole
page](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#adding-a-new-version)
and [version a block of
content](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/single-sourcing-content.md#versioning-blocks-of-content).
- [x] Add a checklist item for anything that needs to happen before this
PR is merged, such as "needs technical review" or "change base branch."

Adding new pages (delete if not applicable):
- [x] Add page to `website/sidebars.js`
- [x] Provide a unique filename for the new page

Removing or renaming existing pages (delete if not applicable):
- [x] Remove page from `website/sidebars.js`
- [x] Add an entry `website/static/_redirects`
- [x] Run link testing locally with `npm run build` to update the links
that point to the deleted page

website/docs/docs/build/about-metricflow.md

@@ -82,7 +82,7 @@ The following example data is based on the Jaffle Shop repo. You can view the co
 To make this more concrete, consider the metric `order_total`, which is defined using the SQL expression:
 
 `select sum(order_total) as order_total from orders` 
-This expression calculates the revenue from each order by summing the order_total column in the orders table. In a business setting, the metric order_total is often calculated according to different categories, such as"
+This expression calculates the total revenue for all orders by summing the order_total column in the orders table. In a business setting, the metric order_total is often calculated according to different categories, such as"
 - Time, for example `date_trunc(ordered_at, 'day')`
 - Order Type, using `is_food_order` dimension from the `orders` table.