Improve regex to add -H option

scripts/docker/enable-docker-insecure.ps1

@@ -7,4 +7,4 @@ if (!(Get-NetFirewallRule | where {$_.Name -eq "Dockerinsecure2375"})) {
 
 Write-Host "Enabling Docker to listen on insecure port 2375"
 cp C:\ProgramData\docker\runDockerDaemon.cmd C:\ProgramData\docker\runDockerDaemon.cmd.bak
-cat C:\ProgramData\docker\runDockerDaemon.cmd.bak | %{$_ -replace '^dockerd -H npipe://$','dockerd -H npipe:// -H 0.0.0.0:2375'} | Set-Content C:\ProgramData\docker\runDockerDaemon.cmd
+cat C:\ProgramData\docker\runDockerDaemon.cmd.bak | %{$_ -replace '^dockerd -H npipe://\s*$','dockerd -H npipe:// -H 0.0.0.0:2375'} | Set-Content C:\ProgramData\docker\runDockerDaemon.cmd