Added link to the Spark-Jupyter Notebook Getting Started from the main Getting Started Page (#1453)

* Added link to the Spark-Jupyter Notebook Getting Started from the main Quickstart page

* Typo

Co-authored-by: Eric Maynard <emaynard@apache.org>

* Suggestions as per @eric-maynard's review

* Fix Typo

---------

Co-authored-by: Eric Maynard <emaynard@apache.org>

Author: adnanhemani

site/content/in-dev/unreleased/getting-started/using-polaris.md

@@ -300,4 +300,8 @@ curl -v http://127.0.0.1:8181/api/management/v1/principal-roles -H "Authorizatio
 curl -v http://127.0.0.1:8181/api/management/v1/catalogs/quickstart_catalog -H "Authorization: Bearer $POLARIS_TOKEN"
 ```
 
+## Next Steps
+* Visit [Configuring Polaris for Production]({{% relref "../configuring-polaris-for-production" %}}).
+* A Getting Started experience for using Spark with Jupyter Notebooks is documented [here](https://github.com/apache/polaris/blob/main/getting-started/spark/README.md).
+