Documentation: fix a typo and make the section title clear

What does this MR do?

Fix typo and makes it clear what the section is about

Related issues

N/A

Changing the header title?

• Is it completely necessary to change the title? Changing titles breaks deep linking. If yes, proceed further.
• Move the old heading title to the bottom of the page.
• Change the header tag to h5, #####. changed to h3 as suggested here

Moving docs to a new location?

No