Update README.md

Author: Adrián Bolonio

README.md

@@ -35,9 +35,9 @@ inherit_gem:
 
 Install all of the required gems
 
-```sh[]
+```sh
 bundle install
-```[]
+```
 
 Run the tests
 
@@ -60,4 +60,4 @@ examples/documentation.
 
 ## Contributing
 
-If you have any suggestion for how this project could be improved, please read the [contributing guidelines](https://github.com/github/rubocop-rails-accessibility/blob/main/CONTRIBUTING.md).
+If you have any suggestion for how this project could be improved, please read the [contributing guidelines](https://github.com/github/rubocop-rails-accessibility/blob/main/CONTRIBUTING.md).