modify pattern name input placeholder.

src/page-components/pattern-editor/PatternHeader.tsx

@@ -6,7 +6,7 @@ import styles from './PatternHeader.module.css';
 const PatternHeader: FC = () => {
   return (
     <div className={styles.pattern_header}>
-      <EditableContent as="h3" placeholder="Unnamed Pattern" additionalClassName={styles.content} />
+      <EditableContent as="h3" placeholder="Pattern Name" additionalClassName={styles.content} />
       <div className="spacer" />
       <button className="tonal">
         <Icon icon="material-symbols-light:close" />