Simplify warning message in Navigation block settings.

package.json

@@ -31,6 +31,7 @@
 		"@babel/runtime-corejs3": "7.25.7",
 		"@babel/traverse": "7.25.7",
 		"@emotion/babel-plugin": "11.11.0",
+		"@emotion/is-prop-valid": "1.2.2",
 		"@emotion/jest": "11.7.1",
 		"@emotion/native": "11.0.0",
 		"@geometricpanda/storybook-addon-badges": "2.0.5",
@@ -151,7 +152,7 @@
 		"redux": "5.0.1",
 		"resize-observer-polyfill": "1.5.1",
 		"rimraf": "5.0.10",
-		"rtlcss": "4.0.0",
+		"rtlcss": "4.3.0",
 		"sass": "1.50.1",
 		"sass-loader": "16.0.3",
 		"semver": "7.5.4",

packages/block-library/src/navigation/edit/index.js

@@ -566,7 +566,7 @@ function Navigation( {
 	const submenuAccessibilityNotice =
 		! showSubmenuIcon && ! openSubmenusOnClick
 			? __(
-					'The current menu options offer reduced accessibility for users and are not recommended. Enabling either "Open on Click" or "Show arrow" offers enhanced accessibility by allowing keyboard users to browse submenus selectively.'
+					'Reduced accessibility. Enable "Open on Click" or "Show arrow" for better keyboard navigation.'
 			  )
 			: '';