fix(storefront): Add missing nonces to all script tags

[pvaladez]

What?

Add missing nonce="{{nonce}}" nonces to all script tags.

Adds to nonces to following files:

• templates/pages/account/orders/invoice.html
• templates/pages/order-confirmation.html
• templates/components/products/schema.html
• templates/pages/subscribed.html

Requirements

• CHANGELOG.md entry added (required for code changes only)

Tickets / Documentation

n/a

Screenshots (if appropriate)

n/a

[pvaladez]

I had initially assumed that the nonce-enforcing CSP policy would be applied for all pages, site-wide. However, after testing it, it looks the CSP header is only set on the checkout page.

Still, I suppose it doesn't hurt to have the nonce handlebars there just in case nonces are enforced site-wide in the future.

[Tiggerito]

I have done the same. The nonce is blank on other pages, and this does not seem to cause any issues.