Bump minimum required WordPress version to 6.7 (#775)

Author: t-hamano

readme.txt

@@ -1,7 +1,7 @@
 === Create Block Theme ===
 Contributors: wordpressdotorg, mikachan, onemaggie, pbking, scruffian, mmaattiiaass, jffng, madhudollu, egregor, vcanales, jeffikus, cwhitmore
 Tags: themes, theme, block-theme
-Requires at least: 6.6
+Requires at least: 6.7
 Tested up to: 6.8
 Stable tag: 2.7.0
 Requires PHP: 7.4

src/editor-sidebar/screen-header.js

@@ -17,7 +17,7 @@ import { chevronRight, chevronLeft } from '@wordpress/icons';
 
 const ScreenHeader = ( { title, onBack } ) => {
 	// TODO: Remove the fallback component when the minimum supported WordPress
-	// version was increased to 6.7.
+	// version was increased to 6.8.
 	const BackButton = Navigator?.BackButton || NavigatorToParentButton;
 	return (
 		<Spacer marginBottom={ 0 } paddingBottom={ 4 }>