Minor spelling and grammer fixes in the PPTX.

[gomezdevelopment]

Description

Motivation and Context

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] My code is apporpiate for youth scouts ages 11-17.