Twenty Twenty's `style.css` file has `/*rtl:ignore*/` for the `.has-text-align-left` class, but that was previously missing from the `.has-text-align-right` class. As a result, the theme overrides block library styles on the front-end (and not in the editor). This changeset adds the missing declaration.
Props amirkamizi, mayankmajeji, ianbelanger, sabernhardt, hasanuzzamanshamim.
Fixes#49447.
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