Twenty Twenty version bump

[ianbelanger]

We are releasing a new version of Twenty Twenty today thus we need to bump the version.

[ianbelanger]

In 47800:

Bundled Themes: Twenty Twenty version bump.

We are releasing a new version of Twenty Twenty today thus we need to bump the version.

Props ianbelanger.
Fixes #50174.

[Otto42]

Theme released: ​https://themes.trac.wordpress.org/ticket/84106

[SergeyBiryukov]

In 48029:

Bundled Themes: Bump Twenty Twenty and Twenty Nineteen versions.

This was intended for the WordPress 5.4.2 release, but will now be released with WordPress 5.4.3 instead.

Props ianbelanger, ocean90.
Merges [47800] and [47952] to the 5.4 branch.
Fixes #50359. See #50174.