Update link (home-assistant#5440)

ferazambuja · fabaff · commit 251b2b67d3e3 · 2018-05-27T09:53:28.000+02:00
Updated the link for  "set up encryption using Let's Encrypt" for the latest one.
Instead of sending the user to the outdated version with the link for the newest one.
diff --git a/source/_docs/configuration/remote.markdown b/source/_docs/configuration/remote.markdown
@@ -15,7 +15,7 @@ The most common approach is to set up port forwarding from your router to port 8
 
 A problem with making a port accessible is that some Internet Service Providers only offer dynamic IPs. This can cause you to lose access to Home Assistant while away. You can solve this by using a free Dynamic DNS service like [DuckDNS](https://www.duckdns.org/).
 
-Remember: Just putting a port up is not secure. You should definitely consider encrypting your traffic if you are accessing your Home Assistant installation remotely. For details please check the [set up encryption using Let's Encrypt](/blog/2015/12/13/setup-encryption-using-lets-encrypt/) blog post, or this [detailed guide](/docs/ecosystem/certificates/lets_encrypt/) to using Let's Encrypt with HA.
+Remember: Just putting a port up is not secure. You should definitely consider encrypting your traffic if you are accessing your Home Assistant installation remotely. For details please check the [set up encryption using Let's Encrypt](/blog/2017/09/27/effortless-encryption-with-lets-encrypt-and-duckdns/) blog post, or this [detailed guide](/docs/ecosystem/certificates/lets_encrypt/) to using Let's Encrypt with HA.
 
 Protect your communication with a [self-signed certificate](/cookbook/tls_self_signed_certificate/) between your client and the Home Assistant instance.
 
