Fix(windows): remove space character (#16)

Author: jason-nabooki

ec2-instance-connect/aws-ssm-ec2-proxy-command.ps1

@@ -13,7 +13,7 @@
 # Add following SSH Config Entry to ~/.ssh/config
 #   host i-* mi-*
 #     IdentityFile ~/.ssh/id_rsa
-#     ProxyCommand powershell .exe ~/.ssh/aws-ssm-ec2-proxy-command.ps1 %h %r %p ~/.ssh/id_rsa.pub
+#     ProxyCommand powershell.exe ~/.ssh/aws-ssm-ec2-proxy-command.ps1 %h %r %p ~/.ssh/id_rsa.pub
 #     StrictHostKeyChecking no
 #
 # Ensure SSM Permissions for Target Instance Profile
@@ -67,4 +67,4 @@ aws ssm start-session `
   --target "$ec2_instance_id" `
   --document-name 'AWS-StartSSHSession' `
   --parameters "portNumber=$ssh_port"
-if($LASTEXITCODE -ne 0) { Write-Error "Failed to start ssm session to instance $ec2_instance_id" }
+if($LASTEXITCODE -ne 0) { Write-Error "Failed to start ssm session to instance $ec2_instance_id" }