chore: Proofreading the docs (#163)

* summary

* stuct

* env setup

* contract testing

src/SUMMARY.md

@@ -6,7 +6,7 @@ Summary
 
 # Getting Started
 
-  <!-- - [Local environnement setup](./ch00/env_setup.md) -->
+  <!-- - [Local environment setup](./ch00/env_setup.md) -->
   - [Basics of a Starknet contract](./ch00/basics/introduction.md)
     - [Storage](./ch00/basics/storage.md)
     - [Constructor](./ch00/basics/constructor.md)

src/ch00/env_setup.md

@@ -1,4 +1,4 @@
-# Local environnement setup
+# Local environment setup
 
 The current version of this book use `{{#include ../../.tool-versions}}`
 

src/ch00/testing/contract-testing.md

@@ -44,7 +44,7 @@ You may also need the `info` module from the corelib, which allows you to access
 
 
 You can found the full list of functions in the [Starknet Corelib repo](https://github.com/starkware-libs/cairo/tree/main/corelib/src/starknet).
-You can also find a detailled explaination of testing in cairo in the [Cairo book - Chapter 9](https://book.cairo-lang.org/ch09-01-how-to-write-tests.html).
+You can also find a detailed explanation of testing in cairo in the [Cairo book - Chapter 9](https://book.cairo-lang.org/ch09-01-how-to-write-tests.html).
 
 ## Starknet Foundry
 

src/ch02/list.md

@@ -8,7 +8,7 @@ An ordered sequence of values that can be used in Starknet storage:
 
 ```rust
 #[storage]
-stuct Storage {
+struct Storage {
   amounts: List<u128>
 }
 ```