Describe the problem that you experienced

The documentation for ng-content shows it set up as follows:

<!-- Component template -->
<div class="card-shadow">
  <ng-content select="card-title"></ng-content>
  <div class="card-divider"></div>
  <ng-content select="card-body"></ng-content>
</div>

And to use the above component like so:

<!-- Using the component -->
<custom-card>
  <card-title>Hello</card-title>
  <card-body>Welcome to the example</card-body>
</custom-card>

when I've tried this in my ow project (and using the above code as well as my own) the component using the component throws an error in the template saying:

'card-title' is not a known element:

1. If 'card-title' is an Angular component, then verify that it is included in the '@Component.imports' of this component.
2. If 'card-title' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@Component.schemas' of this component to suppress this message.ngtsc(-998001)

the only way I've got this to work is to change the component to:

<custom-card>
  <div card-title>Hello</div>
  <div card-body>Welcome to the example</div>
</custom-card>

Before I submit a PR to update the documentation I wanted to check to see if this is correct and the documentation is wrong (it may have worked like the documentation suggests in a previous version).

Or I've completely missed something and the documentation is correct

Enter the URL of the topic with the problem

https://angular.dev/guide/components/content-projection

Describe what you were looking for in the documentation

How to use multiple ng-contents in a component

Describe the actions that led you to experience the problem

components using multiple ng-contents throws error in template
'card-title' is not a known element:

1. If 'card-title' is an Angular component, then verify that it is included in the '@Component.imports' of this component.
2. If 'card-title' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@Component.schemas' of this component to suppress this message.ngtsc(-998001)

Describe what you want to experience that would fix the problem

A working set of examples

Add a screenshot if that helps illustrate the problem

No response

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If the problem is browser-specific, please specify the device, OS, browser, and version

Provide any additional information here in as much as detail as you can