2391: Documentation fixes r=mergify[bot] a=adamward-git
## What type of PR?
(documentation)
## What does this PR do?
Spelling corrections, gammar fixes.
### Related issue(s)
N/A
## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.
N/A
Co-authored-by: Adam Ward <awjob@internode.on.net>
Co-authored-by: adamward-git <82577349+adamward-git@users.noreply.github.com>
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