Overview

What does this pull request do?

Changes "companies" to "corporate vehicles" in the intro.

How can a reviewer test or examine your changes?

Eyeball them

Who is best placed to review it?

@StephenAbbott

Closes #

Translations

[x] New or edited strings appearing as a result of this PR will be picked up for translation
[x] I've notified the translation coordinator of any new strings that will need translating. See: https://openownership.github.io/bods-dev-handbook/translations.html

[x] I've checked that the documentation builds without failing. See: https://github.com/openownership/data-standard#building-the-documentation-locally
[x] I've thought about how and when this needs to be released. See: https://openownership.github.io/bods-dev-handbook/standard_releases.html
[x] I've updated the changelog, if necessary.
[x] I've updated reference.rst to reflect any changes to schema structure or naming.
[x] I've added or edited any other related documentation. See: https://github.com/openownership/bods-dev-handbook/blob/master/style_guide.md