Unable to swizzle sidebar category caret icon

Edited by @slorber, see https://github.com/facebook/docusaurus/issues/7902#issuecomment-1209598343

---

### 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.
- [X] I have tried creating a repro with https://new.docusaurus.io.
- [X] I have read the console error message carefully (if applicable).

### Description

Changing the size of the IconArrow doesn't reflect on site.

### Reproducible demo

_No response_

### Steps to reproduce

1. Swizzle IconArrow
2. Change size of svg Width and height
3. IconArrow doesn't resize

### Expected behavior

Expected IconArrow to resize according to size set in index.js

### Actual behavior

Nothing, no change.

### Your environment

- Public source code:
- Public site URL:
- Docusaurus version used:
- 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.