more precision in test command inside README.md

exercises/ex00-testing/README.md

@@ -25,5 +25,5 @@ In ```ex00-writing-tests/flipper/src/tests/``` you will find the ```mock.rs``` f
 * Events and Errors: https://docs.substrate.io/main-docs/build/events-errors/
 
 ## Ensure everything is ok
-`cargo check`  
-`cargo test`
+`cargo check --package pallet-flipper`  
+`cargo test --package pallet-flipper`

exercises/ex01-pallet-easy/README.md

@@ -10,7 +10,7 @@ We placed some helpful comments in the code 😉.
 Launch the tests by running:
 
 ```sh
-$ cargo test
+$ cargo test --package pallet-assets
 ```
 
 ## What to focus on?

exercises/ex05-hooks/README.md

@@ -20,7 +20,7 @@ You will succeed once every tests passes :).
 Launch the tests by running:
 
 ```sh
-$ cargo test
+$ cargo test --package pallet-reminder
 ```
 
 ## some links

exercises/ex06-weights/README.md

@@ -80,7 +80,7 @@ You will succeed once every test passes :).
 Launch the tests by running:
 
 ```sh
-$ cargo test
+$ cargo test --package pallet-weight
 ```
 
 ## Part 3 - Conditional weights