docs: Update private-packages.md nuget section (#16942)

docs/usage/getting-started/private-packages.md

@@ -322,7 +322,18 @@ npmRegistries:
 ### nuget
 
 For each known NuGet registry, Renovate searches for `hostRules` with `hostType=nuget` and matching host.
-For those found, a command similar to the following is run: `dotnet nuget add source ${registryInfo.feedUrl} --configfile ${nugetConfigFile} --username ${username} --password ${password} --store-password-in-clear-text`
+For those found, a command like the following is run: `dotnet nuget add source ${registryInfo.feedUrl} --configfile ${nugetConfigFile} --username ${username} --password ${password} --store-password-in-clear-text`.
+
+```js
+hostRules: [
+  {
+    matchHost: 'https://pkgs.dev.azure.com/<org>/',
+    hostType: 'nuget',
+    username: 'user', // doesn't matter for azure
+    password: '<PAT>',
+  },
+];
+```
 
 ### poetry