Content proposal

## 📝 Content Proposal

### Synopsis
A clear and concise description of the content you will be contributing.

### Content type

- [ ] Guide
- [ ] Tutorial
- [x] Example
- [ ] Translation
- [ ] Other (please specify)

### Process
Read the [contributing guide](https://amp.dev/documentation/guides-and-tutorials/contribute/contribute-documentation/?format=websites), then create a copy of [this template](https://docs.google.com/document/d/18i_lbQ-h-auYW2SwbWRuuu2_xhtU5XrjXlcCtj0sNeY/edit?usp=sharing) and fill in the proposal and outline sections. When you’ve finished, add the link to this issue and check the box for step one. A member of the AMP team will assign the ticket to themselves and work as your reviewer through the remaining steps. Thanks for contributing to AMP!

- [ ] 1. Proposal created: ``.
- [ ] 2. Proposal approved.
- [ ] 3. Draft complete.
- [ ] 4. Draft approved.
- [ ] 5. Pull request submitted.
- [ ] 6. Pull request approved!

Start with the linked AMP contributing guide, then copy the provided Google Docs template and complete its proposal and outline sections for the example content. Add the completed proposal link to this issue and check step one; the remaining steps require team review, an approved draft, and a pull request.

Written by the indexing model from the issue text.