Update learn.json

learn.json

@@ -6,7 +6,7 @@
 	"difficulty": "beginner",
 	"solution": "https://bitbucket.org/codingacademy/instagram-without-bootstrap",
 	"duration" : 6,
-	"template_url": "https://github.com/4GeeksAcademy/html-hello"
+	"template_url": "https://github.com/4GeeksAcademy/html-hello",
 	"description" : "Very simple instagram simulation to understand the basics of CSS and HTML5 and how to use them together to create a website.",
 	"preview": "https://github.com/breatheco-de/exercise-instagram-feed/blob/master/preview.gif?raw=true",
 	"technologies": ["html", "css", "flex-box", "layouts", "css-grid", "html/css"],