### What is this PR for?
This is a grammar fix for the README.

### What type of PR is it?
Improvement

### Todos
None

### What is the Jira issue?
I haven't opened a Jira issue, hopefully this is a small enough fix that it doesn't require one.

### How should this be tested?
N/A
### Screenshots (if appropriate)
None
### Questions:
None

Author: fredster33 <64927044+fredster33@users.noreply.github.com>

Closes #4073 from fredster33/patch-1 and squashes the following commits:

f74f31623 [fredster33] Grammar fix