Correctly ignore failure from re-publishing Install-VSCode.ps1

We actually need to ignore the task's failure, not the failure in the
script.

Author: andyleejordan

.vsts-ci/templates/publish-markets.yml

@@ -13,5 +13,6 @@ steps:
 # NOTE: We rarely update this script, so we can ignore errors from the gallery
 # caused by us trying to re-publish an updated script.
 - pwsh: |
-    Publish-Script -Path $(Pipeline.Workspace)/vscode-powershell/Install-VSCode.ps1 -ErrorAction Continue -NuGetApiKey $(GalleryToken)
+    Publish-Script -Path $(Pipeline.Workspace)/vscode-powershell/Install-VSCode.ps1 -NuGetApiKey $(GalleryToken)
   displayName: Publishing Install-VSCode.ps1 to PowerShell Gallery
+  continueOnError: true