chore(docs): fix spelling and grammar

[hyamero]

Why

Spelling and grammar mistakes are present in the overview section

What

Fixed spelling mistakes and improved grammar

Checklist

• Documentation updated
• Ready to be merged

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Name	Status	Preview	Updated
react-spring-io	❌ Failed (Inspect)		Jul 23, 2022 at 6:48AM (UTC)

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit ae667c2:

Sandbox	Source
spring-animating-auto	Configuration
spring-card	Configuration
spring-cards-stack	Configuration
spring-chain	Configuration
spring-css-keyframes	Configuration
spring-draggable-list	Configuration
spring-exit-before-enter	Configuration
spring-flip-card	Configuration
spring-goo-blobs	Configuration
spring-image-fade	Configuration
spring-list-reordering	Configuration
spring-masonry	Configuration
spring-multistage-transition	Configuration
spring-notification-hub	Configuration
spring-notification-hub	Configuration
spring-notification-hub	Configuration
initial-rocket	Configuration
spring-simple-transition	Configuration
spring-svg-filter	Configuration
spring-slide	Configuration
spring-tree	Configuration
spring-viewpager	Configuration

[joshuaellis]

Thanks for the contribution!! ⭐