Fixed typo in SendGrid comment (#295)

Thx to @gnurag!

Author: gnurag

.env.example

@@ -15,7 +15,7 @@ SESSION_SECRET=ashdfjhasdlkjfhalksdjhflak
 FACEBOOK_ID=754220301289665
 FACEBOOK_SECRET=41860e58c256a3d7ad8267d3c1939a4a
 
-# SendGrid Login - create an account with SendGrid her: https://signup.sendgrid.com/
+# SendGrid Login - create an account with SendGrid here: https://signup.sendgrid.com/
 SENDGRID_USER=myusername
 SENDGRID_PASSWORD=mysecurepassword