Add cover annotation

Author: mukeshpanchal27

plugins/auto-sizes/tests/test-improve-calculate-sizes.php

@@ -1274,6 +1274,8 @@ public static function data_image_block_with_parent_columns_and_its_parent_group
 
 	/**
 	 * Test that the image block in a two-column layout renders the correct sizes attribute.
+	 *
+	 * @cover ::auto_sizes_filter_image_tag
 	 */
 	public function test_image_block_in_two_column_layout_renders_correct_sizes_attribute(): void {
 		// Skip test for WordPress versions below 6.8.
@@ -1299,6 +1301,8 @@ public function test_image_block_in_two_column_layout_renders_correct_sizes_attr
 
 	/**
 	 * Test that the image block in a three-column layout renders the correct sizes attribute.
+	 *
+	 * @cover ::auto_sizes_filter_image_tag
 	 */
 	public function test_image_block_in_three_column_layout_renders_correct_sizes_attribute(): void {
 		// Skip test for WordPress versions below 6.8.