feat: sanitize content in SImageVector

[gtsp233]

Fix for Cross-Site Scripting (XSS) Vulnerability

I've identified a Cross-Site Scripting (XSS) vulnerability in the @sugarlabs/mb4-components package.

Vulnerability Details:

• Severity: High/Critical
• Description: There's a risk of malicious script execution when the content is controlled by an adversory.

Steps to Reproduce:
In a React.js project:

import { SImageVector } from '@sugarlabs/mb4-components'

<SImageVector content={`<img src='' onError=alert(1)>`} />

Then the malicious code alert(1) will be executed.

Suggested Fix or Mitigation:
It's a best practice for a React.js components package to sanitize the HTML content before passing it to innerHTML.

I've already fixed and tested this issue, and have submitted a pull request with the necessary changes. Please review and merge my pull request at your earliest convenience to resolve this vulnerability. Thanks!