Go to project at /Code/themes/business-time
Update the version in package.json
run vsce publish
After a few minutes see it on the VS Code light theme marketplace
To update the Azure hosted git repo you’ll probably need a new Personal Access Token (PAT). Generate that in the UI, then you can use it as the password when using to that remote.
git push https://mike--healy@dev.azure.com/mike--healy/Themes/_git/Themes
But maybe the vsce publish command above is enough, and you don’t need to update the repo?