Fix unclear sentence and misuse of word 'stand' (#278)

* Fix unclear sentence and misuse of word 'stand'

This sentence was not very clear. Also, the word 'stand' was used, but I think the word 'understand' was what was intended.
The sentence has been updated to convey what I think was the intended meaning.

* Update docs/GettingStarted.md

Co-authored-by: Michał Pierzchała <[email protected]>

Author: JesseRWeigel

docs/GettingStarted.md

@@ -13,7 +13,7 @@ You finally want to approach testing using only best practices, while Enzyme may
 
 ## This solution
 
-The `react-native-testing-library` is a lightweight solution for testing your React Native components. It provides light utility functions on top of `react-test-renderer` letting you always be up to date with latest React features and write any component tests you like. But really not any, it prevents you from testing implementation details because we stand this is a very bad practice.
+The `react-native-testing-library` is a lightweight solution for testing your React Native components. It provides light utility functions on top of `react-test-renderer` letting you always be up to date with latest React features and write any component tests you like. It also prevents you from testing implementation details because we believe this is a very bad practice.
 
 This library is a replacement for [Enzyme](http://airbnb.io/enzyme/).