Added a Full stop on the line 103.

Author: shonebinu

README.md

@@ -100,7 +100,7 @@ You can run this documentation offline by using [Docsify](https://docsify.js.org
 
 ## PDF
 
-A PDF of all of the lessons can be found [here](https://microsoft.github.io/Web-Dev-For-Beginners/pdf/readme.pdf)
+A PDF of all of the lessons can be found [here](https://microsoft.github.io/Web-Dev-For-Beginners/pdf/readme.pdf).
 
 ## Other Curricula