Fix typo

docs/README.md

@@ -15,9 +15,9 @@ Finally, all Sphinx-related settings are configured in `docs/source/conf.py`.
 
 ## Skipping the example notebooks
 
-The example notebooks are all executued by default when building the documentation.
+The example notebooks are all executed by default when building the documentation.
 This can take a long time, so it is possible to skip execution when building the documentation locally.
 To do so, simply set the `SKIP_NOTEBOOKS` environmental variable when building the documentation, like so
-```
+```shell
 SKIP_NOTEBOOKS=1 poetry run make html --directory=docs
 ```