Added R into the PAYG overview per the UI

management/pay-as-you-go/index.md

@@ -14,7 +14,7 @@ Free Plan projects have the following limits:
 - **Azure North Europe**: Project is located in Europe, deployed in Microsoft Azure cloud. Read more about stack [here](/overview/#stacks).
 - **Single project:** each account is limited to one project, so it is not feasible for [multi-project architecture](/catalog/multi-project/).
 - **Data Catalog:** sharing & grouping data using the [data catalog](/catalog/) is not available. 
-- **Transformations:** are limited to [SQL](/transformations/snowflake-plain/) and [Python](/transformations/python-plain/).
+- **Transformations:** are limited to [SQL](/transformations/snowflake-plain/), [Python](/transformations/python-plain/) and [R](/transformations/r-plain/).
 - **DataScience:** training and deploying [ML models](transformations/ml-model-deployment/) is not available.
 - **Dynamic backend scaling:** possibility to choose the [backend size](/transformations/snowflake-plain/) for each transformation is not available. 
 - **Performance:** is limited to an XSmall data warehouse (DWH) (half the speed of standard projects) and doesn’t allow for Python workspace sizing.