Restore: Sync Gutenberg @ 487a096a9782ba6110a7686d7b4b2d0c55ed1b06

See changelog in 3678df3e8051366e1198f3a09fe098becb9dc436

> Editor: Bump pinned hash for the Gutenberg repository. This updates the pinned hash from the `gutenberg` from `8c78d87453509661a9f28f978ba2c242d515563b` to `487a096a9782ba6110a7686d7b4b2d0c55ed1b06`.
> The following changes are included:
>
> - Disables anchor support for the Page Break block. (https://github.com/WordPress/gutenberg/pull/76434)

git-svn-id: https://develop.svn.wordpress.org/branches/fixes-64393-restore-version-history@62136 602fd350-edb4-49c9-b593-d223f7449a82