Typo fix in @labs/cli README.md (#3232)
Typo fix in @labs/cli README.md (#3232)

`localize` got mixed up with `labs` on the paragraph about the `labs gen` usage.
lit/lit,Polymer/lit-html,Polymer/lit-html,Polymer/lit-html,lit/lit,lit/lit,Polymer/lit-html,lit/lit