Update style revision top toolbar text

Fixes #51202 by updating just the copy from "Global styles revisions" to "Style Revisions", matching what we show with "Style Book".

packages/edit-site/src/components/editor-canvas-container/index.js

@@ -35,7 +35,7 @@ function getEditorCanvasContainerTitle( view ) {
 			return __( 'Style Book' );
 		case 'global-styles-revisions':
 		case 'global-styles-revisions:style-book':
-			return __( 'Global styles revisions' );
+			return __( 'Styles Revisions' );
 		default:
 			return '';
 	}