Improve jsdoc (microsoft#163883)

Author: alexdima

src/vs/editor/common/config/editorOptions.ts

@@ -262,8 +262,7 @@ export interface IEditorOptions {
 	 */
 	smoothScrolling?: boolean;
 	/**
-	 * Enable that the editor will install an interval to check if its container dom node size has changed.
-	 * Enabling this might have a severe performance impact.
+	 * Enable that the editor will install a ResizeObserver to check if its container dom node size has changed.
 	 * Defaults to false.
 	 */
 	automaticLayout?: boolean;

src/vs/monaco.d.ts

@@ -3100,8 +3100,7 @@ declare namespace monaco.editor {
 		 */
 		smoothScrolling?: boolean;
 		/**
-		 * Enable that the editor will install an interval to check if its container dom node size has changed.
-		 * Enabling this might have a severe performance impact.
+		 * Enable that the editor will install a ResizeObserver to check if its container dom node size has changed.
 		 * Defaults to false.
 		 */
 		automaticLayout?: boolean;