Bump js version to 6.4.1 (#8190)

* Bump js version to 6.4.1

* Update changelog for version 6.4.1 fixes and features

Fix DOM sanitization issues and improve custom layer transitions.

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Co-authored-by: HarelM <3269297+HarelM@users.noreply.github.com>
Co-authored-by: Harel M <harel.mazor@gmail.com>