Fix typo in console.log

Author: nathansherburn

src/index.js

@@ -29,7 +29,7 @@ function init(matrix) {
   console.log('\n');
 
   // Part 2: Predict Price of 1650 square meter and 3 bedroom house
-  console.log('Part 3: Price Prediction ...\n');
+  console.log('Part 2: Price Prediction ...\n');
 
   let houseVector = [1, 1650, 3];
   let price = math.eval('houseVector * theta', {