Escaping HTML entities

### Describe the Issue

We have a challenge that asks campers to replace symbols like `&` with the relevant HTML entity `&`. It's a neat little challenge, BUUUUUUT...

The in-app console we render sanitises the entities back to HTML. So with correct code, campers still see `&` instead of `&`.

https://imgur.com/a/xxjSSW2

### Affected Page

https://www.freecodecamp.org/learn/full-stack-developer/lab-html-entitiy-converter/implement-an-html-entity-converter

### Steps to Reproduce

1. Go to https://www.freecodecamp.org/learn/full-stack-developer/lab-html-entitiy-converter/implement-an-html-entity-converter
2. Enter the following code.
3. Open browser console.
4. See different results.

```js
function convertHTML(str) {
let newStr = "";
for (let char of str) {
if (char == "&") {
newStr += "&";
} else if (char == "<") {
newStr += "<";
} else if (char == ">") {
newStr += ">";
} else if (char == '"') {
newStr += """;
} else if (char == "'") {
newStr += "'";
} else {
newStr += char;
}
}
return newStr;
}

console.log(convertHTML("Dolce & Gabbana"));
```

### Expected behavior

The in-app console should render `Dolce & Gabanna

### Screenshots

_No response_

### System

Irrelevant

### Additional context

https://www.reddit.com/r/FreeCodeCamp/comments/1ovgdgm/current_javascript_version_autoconvert_makes/