 Docs: API overview text clarity & kv2 mention... #16746 (#16748)
 Docs: API overview text clarity & kv2 mention... #16746 (#16748)

* Docs: API overview text clarity & kv2 mention... #16746 

Corrected text and terminology. Relates to #6378 & should allow for closure of that issue too.
<img width="1158" alt="Screenshot 2022-08-16 at 19 23 20" src="https://user-images.githubusercontent.com/974854/184941452-2b2c680a-b6d5-4db6-85aa-e5dc672499f6.png">

* Trigger CI

* Update website/content/api-docs/index.mdx

Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>

* Update website/content/api-docs/index.mdx

Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>

* Update website/content/api-docs/index.mdx

Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>

* Update website/content/api-docs/index.mdx

Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>

* Update website/content/api-docs/index.mdx

Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>

* Updated based on feedback.

* Docs: API overview text clarity & kv2 mention...

Added KV2 explict further to feedback from @benashz.

Also:
 - Adjusted very first paragraph a bit.
 - improved grammer and over use of `via` and `to` in certian places.

Co-authored-by: Zlaticanin <432e4bc7f15f9060dda555fb7b1e6a48c5ef4b3f@gmail.com>
Co-authored-by: Ben Ash <9598223fbf3dc57239699508eac2503c34cabf1e@users.noreply.github.com>
Co-authored-by: Yoko Hyakuna <5561a8d1ecfd1fe0978cbf17851e48406756a742@hashicorp.com>
hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault,hashicorp/vault