Added an item with github source authentication to the dotnet CLI in …

…the instructions for GitHub Packages (github#33314)

Co-authored-by: Jacob Wallraff <[email protected]>
Co-authored-by: Alex Nguyen <[email protected]>

content/packages/working-with-a-github-packages-registry/working-with-the-nuget-registry.md

@@ -103,7 +103,13 @@ If your instance has subdomain isolation disabled:
 
 ## Publishing a package
 
-You can publish a package to {% data variables.product.prodname_registry %} by authenticating with a _nuget.config_ file, or by using the `--api-key` command line option with your {% data variables.product.prodname_dotcom %} {% data variables.product.pat_v1 %}.
+You can publish a package to {% data variables.product.prodname_registry %} by authenticating with a _nuget.config_ file, using the `--api-key` command line option with your {% data variables.product.prodname_dotcom %} {% data variables.product.pat_v1 %} or by using command that can be run directly from the command line using the `dotnet` command-line interface (CLI).
+
+Replace `OWNER` with your username or company name, and `YOUR_GITHUB_PAT` with your {% data variables.product.pat_generic %}.
+
+```shell
+dotnet nuget add source --username OWNER --password {%raw%}YOUR_GITHUB_PAT{% endraw %} --store-password-in-clear-text --name github "https://{% ifversion fpt or ghec %}nuget.pkg.github.com{% else %}nuget.HOSTNAME{% endif %}/OWNER/index.json"
+```
 
 {% ifversion packages-nuget-v2 %}