Perf: Increase number of eagerly loaded card images

LCP image can end up being in the second row.

See #2679

wp-content/themes/pub/wporg-learn-2024/functions.php

@@ -27,7 +27,7 @@
  * Actions and filters.
  */
 add_action( 'after_setup_theme', __NAMESPACE__ . '\setup' );
-add_filter( 'wp_get_attachment_image_attributes', __NAMESPACE__ . '\eager_load_first_card_row_images', 10, 3 );
+add_filter( 'wp_get_attachment_image_attributes', __NAMESPACE__ . '\eager_load_first_card_rows_images', 10, 3 );
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\enqueue_assets' );
 add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\maybe_enqueue_sensei_assets', 100 );
 
@@ -139,20 +139,20 @@ function enqueue_assets() {
 }
 
 /**
- * Eagerly load the images for the first row of cards, for performance (LCP metric).
+ * Eagerly load the images for the first 2 rows of cards, for performance (LCP metric).
  *
  * @param array   $attr       The image attributes.
  * @param WP_Post $attachment The attachment post object.
  * @param string  $size       The image size.
  * @return array The modified image attributes.
  */
-function eager_load_first_card_row_images( $attr, $attachment, $size ) {
+function eager_load_first_card_rows_images( $attr, $attachment, $size ) {
 	static $image_count = 0;
 
 	if ( is_front_page() || is_archive() || is_search() || is_page( 'my-courses' ) ) {
 		$image_count++;
 
-		if ( $image_count <= 3 ) {
+		if ( $image_count <= 6 ) {
 			$attr['loading'] = 'eager';
 			$attr['fetchpriority'] = 'high';
 		}