boston housing readme update

Author: adarsh0806

projects/boston_housing/README.md

@@ -35,7 +35,7 @@ This will open the Jupyter Notebook software and project file in your browser.
 
 ### Data
 
-The modified Boston housing dataset consists of 490 data points, with each datapoint having 3 features. This dataset is a modified version of the Boston Housing dataset found on the [UCI Machine Learning Repository](https://archive.ics.uci.edu/ml/datasets/Housing).
+The modified Boston housing dataset consists of 489 data points, with each datapoint having 3 features. This dataset is a modified version of the Boston Housing dataset found on the [UCI Machine Learning Repository](https://archive.ics.uci.edu/ml/datasets/Housing).
 
 **Features**
 1.  `RM`: average number of rooms per dwelling