remove cd command that would return users back to root

docs/source/contributors/index.md

@@ -133,23 +133,20 @@ Install test dependencies (needed only once):
 cd ./packages/jupyter-ai/ui-tests/
 jlpm install
 jlpm playwright install
-cd ../../../
 ```
 
 Tests involve snapshot comparisons against a reference snapshots generated by the Github CI. If you are using an OS other than Linux, you will need to generate local snapshots before running the tests locally for the first time. To do this, execute the command:
 
 ```sh
 cd ./packages/jupyter-ai/ui-tests/
 jlpm test:update
-cd ../../../
 ```
 
 To execute tests, run:
 
 ```sh
 cd ./packages/jupyter-ai/ui-tests/
 jlpm test
-cd ../../../
 ```
 
 You can find more information in the