pull fromm rhel8

Author: hgreebe

cookbooks/aws-parallelcluster-platform/resources/fabric_manager/partial/_fabric_manager_install_rhel.rb

@@ -44,5 +44,5 @@ def arch_name
 end
 
 def fabric_manager_url
-  "https://developer.download.nvidia.com/compute/cuda/repos/#{platform}/#{arch_name}/#{fabric_manager_package}-#{fabric_manager_version}-1.#{arch_suffix}.rpm"
+  "https://developer.download.nvidia.com/compute/cuda/repos/rhel8/#{arch_name}/#{fabric_manager_package}-#{fabric_manager_version}-1.#{arch_suffix}.rpm"
 end