Fix typo in lesson 3
Fix typo in lesson 3

Change "website" to "websites".
5y/markdowntutorial.com,felipeuliana/markdowntutorial.com,5y/markdowntutorial.com,gjtorikian/markdowntutorial.com,gjtorikian/markdowntutorial.com,eveningkid/markdowntutorial.com,gjtorikian/markdowntutorial.com,eveningkid/markdowntutorial.com,5y/markdowntutorial.com,felipeuliana/markdowntutorial.com,eveningkid/markdowntutorial.com,LewisMatos/markdowntutorial.com,5y/markdowntutorial.com,LewisMatos/markdowntutorial.com,felipeuliana/markdowntutorial.com,LewisMatos/markdowntutorial.com,LewisMatos/markdowntutorial.com,eveningkid/markdowntutorial.com,gjtorikian/markdowntutorial.com,felipeuliana/markdowntutorial.com