#️⃣ Hash emoji causes errors in title.

### Have you read the Contributing Guidelines on issues?

- [X] I have read the [Contributing Guidelines on issues](https://github.com/facebook/docusaurus/blob/main/CONTRIBUTING.md#reporting-new-issues).

### Prerequisites

- [X] I'm using the latest version of Docusaurus.
- [X] I have tried the `npm run clear` or `yarn clear` command.
- [X] I have tried `rm -rf node_modules yarn.lock package-lock.json` and re-installing packages.
- [ ] I have tried creating a repro with https://new.docusaurus.io.
- [X] I have read the console error message carefully (if applicable).

### Description

The #️⃣ emoji causes errors.
When using the hash emoji as a title (# #️⃣ text) in a page at the beginning, it uses the ID of the page as the title instead.

### Steps to reproduce

1. Create a new docusaurus page
2. Set the title to something with the #️⃣
3. Build the site, the title will be the ID rather than what you specified with the title you specified under it.

### Expected behavior

Put the correct title

### Actual behavior

Already written ^^

### Your environment

- Public source code: https://github.com/PatelN123/Digital-Support-Notes
- Public site URL: https://notes.nayanpatel.net/
- Docusaurus version used: Canary Release

### Reproducible demo

_No response_

### Self-service

- [ ] I'd be willing to fix this bug myself.