Reorder by impact on users

wiki/src/news/version_4.18.mdwn

@@ -31,15 +31,15 @@ hardware (graphics, Wi-Fi, and so on).
 
 <h1 id="upgrades">Fixed problems</h1>
 
-- Display an error message when the Upgrader fails to download the signing key.
-  This has been a silent error since 4.14. ([[!tails_ticket 18238]])
-
 - Use more reliable Debian repositories
 
   Tails now connects to the APT repositories of Debian using their HTTPS address instead of their .onion address, for increased reliability with
   *[[Additional Software|doc/first_steps/additional_software]]* installation.
   We left other Tails and Tor Project APT onion sources as is. ([[!tails_ticket 17993]])
 
+- Display an error message when the Upgrader fails to download the signing key.
+  This has been a silent error since 4.14. ([[!tails_ticket 18238]])
+
 For more details, read our [[!tails_gitweb debian/changelog desc="changelog"]].
 
 <h1 id="issues">Known issues</h1>