Fix RabbitMQ 3.8.5 install links

(cherry picked from commit 7750851)

Author: lukebakken

.travis.yml

@@ -14,7 +14,7 @@ addons:
 
 env:
   global:
-    - RABBITMQ_VERSION=3.8.3
+    - RABBITMQ_VERSION=3.8.5
     - RABBITMQ_DOWNLOAD_URL="https://github.com/rabbitmq/rabbitmq-server/releases/download/v$RABBITMQ_VERSION/rabbitmq-server-generic-unix-$RABBITMQ_VERSION.tar.xz"
     - RABBITMQ_TAR="rabbitmq-$RABBITMQ_VERSION.tar.xz"
 

tools/appveyor/install.ps1

@@ -25,7 +25,7 @@ else
 Write-Host "[INFO] Installing Erlang to $erlang_install_dir..."
 & $erlang_installer_path '/S' "/D=$erlang_install_dir" | Out-Null
 
-$rabbitmq_installer_download_url = 'https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.3/rabbitmq-server-3.8.5.exe'
+$rabbitmq_installer_download_url = 'https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.8.5/rabbitmq-server-3.8.5.exe'
 $rabbitmq_installer_path = Join-Path -Path $HOME -ChildPath 'rabbitmq-server-3.8.5.exe'
 
 $erlang_reg_path = 'HKLM:\SOFTWARE\Ericsson\Erlang'