richSnippet SKU with double-quote

[perryholden]

Issue description

When configurable product SKUs have double-quotes in them (although I realize double-quotes in SKUs are not ideal, that is what exists), then the richSnippet JS breaks. See screenshot below.

I think the most ideal solution would be to replace the double-quotes in the SKU data attribute in \Reviewscouk\Reviews\Block\Richsnippet::getRichSnippet with "template literals" (backticks). This is already done with the description.

If this is an acceptable solution, I can create a PR. Thanks.

Steps to reproduce the issue

1. Create a configurable product with a SKU that contains a double-quote.
2. Navigate to that PDP.

What's the expected result?

• No JS errors

What's the actual result?

• The following JS error shows in the console:

Uncaught SyntaxError: Unexpected token ';' (at sample-url:2347:323)

Additional details / screenshot

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