Update README.md

Author: isangwanrahul

bootcamp/materials/3-spark-fundamentals/README.md

@@ -6,7 +6,8 @@ You need to install the required dependencies in `requirements.txt`
 
 Running `pip install -r requirements.txt` will install them.
 
-Running pytest is easy. You just need to run `python -m pytest` and you're good to go!
+Note: Make sure to have spark set locally before running below.
+Running the pytest is easy. You just need to run `python -m pytest` and you're good to go!
 
 
 
@@ -22,4 +23,4 @@ Or `docker compose up` if you're on Windows!
 
 Then, you should be able to access a Jupyter notebook at `localhost:8888`.
 
-The first notebook to be able to run is the `event_data_pyspark.ipynb` inside the `notebooks` folder.
+The first notebook to be able to run is the `event_data_pyspark.ipynb` inside the `notebooks` folder.