Have you read the Contributing Guidelines on issues?

• I have read the Contributing Guidelines on issues.

Prerequisites

• I'm using the latest version of Docusaurus.
• I have tried the npm run clear or yarn clear command.
• 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.
• I have read the console error message carefully (if applicable).

Description

HTML type sidebar links aren't rendering on v3

Reproducible demo

https://codesandbox.io/p/sandbox/magical-ben-cytfh8?file=%2Fsidebars.js%3A22%2C43

Steps to reproduce

Create HTML sidebar item
Preview site

Expected behavior

HTML sidebar item should appear

Actual behavior

Does not render HTML item

Your environment

• Public source code: https://codesandbox.io/p/sandbox/magical-ben-cytfh8?file=%2Fsidebars.js%3A22%2C43
• Public site URL: https://codesandbox.io/p/sandbox/magical-ben-cytfh8?file=%2Fsidebars.js%3A22%2C43
• Docusaurus version used: 3.0.0
• Environment name and version (e.g. Chrome 89, Node.js 16.4):
• Operating system and version (e.g. Ubuntu 20.04.2 LTS):

Self-service

• I'd be willing to fix this bug myself.