Fixed typo in SendGrid comment (#295)

Thx to @gnurag!

Author: gnurag

.env.example

@@ -15,7 +15,7 @@ SESSION_SECRET=***REMOVED***
 FACEBOOK_ID=***REMOVED***
 FACEBOOK_SECRET=***REMOVED***
 
-# 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