Escaping fix: use json encoding withing script tag.

[peterwilsoncc]

Follow up to r60263.

The original commit uses esc_js() within a <script> tag rather than wp_json_encode(). Per the docs, the esc_js() function is intended to be used within inline script handlers, onclick="thing", rather than within JavaScript tags.

Trac ticket: https://core.trac.wordpress.org/ticket/63114

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[github-actions]

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Props peterwilsoncc, joedolson.

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[github-actions]

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[joedolson]

Looks good! Thanks!

[peterwilsoncc]

Thanks Joe, I'll get this committed. This is the before and after for a file with an & in voice over.

Before	After

[github-actions]

A commit was made that fixes the Trac ticket referenced in the description of this pull request.

SVN changeset: 60520
GitHub commit: 063a74f

This PR will be closed, but please confirm the accuracy of this and reopen if there is more work to be done.