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]

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Please select which version do you want to release:

• Patch (backwards-compatible bug fixes)

• Minor (backwards-compatible functionality)

• Major (incompatible API changes)

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[vtex-io-docs-bot]

Beep boop 🤖

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

• There's nothing new to document 🤔
• I'll do it later 😞

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

• I just updated 🎉🎉