Update intro-to-r.md

Author: gndaskalova

_tutorials/intro-to-r.md

@@ -12,7 +12,7 @@ tags: basic-r
 
 # Tutorial aims: 
 
-1. Understand what are R and R Studio 
+1. Understand what are R and R Studio
 2. Develop the good habit of working with scripts
 3. Learn to import data in R
 4. Learn to manipulate R objects like vectors and data frames