fix(ProductBrand): Correctly display "&" in brand names

[juliabrzvtex]

What problem is this solving?

Currently, if a brand name is registered in the catalog containing the HTML entity for the ampersand character (i.e., &), the ProductBrand component renders this entity literally (e.g., "Brand & Test") instead of displaying the correct character (e.g., "Brand & Test").

This also breaks the excludeBrands prop logic. If a store administrator configures "Brand & Test" for exclusion, the comparison fails because the value coming from the product context is "Brand & Test".

This PR normalizes the brand name to resolve both display and exclusion logic issues.

How to test it?

1. Link this component version in a test store.
2. Choose a product and, in the catalog, change its brand name to include &. (e.g., My & Brand).
3. Go to that product's page on the storefront.
4. Configure the ProductBrand component (either on the product page or in a shelf) to use displayMode="text".
5. Expected Result (Before): The name appears as "My & Brand".
6. Expected Result (After): The name appears correctly as "My & Brand".

Screenshots or example usage:

Before:

After:

[vtex-io-ci-cd[bot]]

Hi! I'm VTEX IO CI/CD Bot and I'll be helping you to publish your app! 🤖

Please select which version do you want to release:

• [ ] Patch (backwards-compatible bug fixes)

• [ ] Minor (backwards-compatible functionality)

• [ ] Major (incompatible API changes)

And then you just need to merge your PR when you are ready! There is no need to create a release commit/tag.

• [ ] No thanks, I would rather do it manually 😞

[vtex-io-docs-bot[bot]]

Beep boop :robot:

I noticed you didn't make any changes at the docs/ folder

• [ ] There's nothing new to document :thinking:
• [ ] I'll do it later :disappointed:

In order to keep track, I'll create an issue if you decide now is not a good time

• [ ] I just updated :tada::tada: