Address code review feedback

Author: swissspidy

src/Font_Collection_Command.php

@@ -394,7 +394,7 @@ public function list_categories( $args, $assoc_args ) {
 
 		$fields    = [ 'slug', 'name' ];
 		$formatter = new Formatter( $assoc_args, $fields, 'category' );
-		/** @var array<int, array<string, mixed>> $categories */
+		/** @var FontCategory[] $categories */
 		$formatter->display_items( $categories );
 	}
 

src/WP_CLI/CommandWithMeta.php

@@ -264,7 +264,7 @@ public function add( $args, $assoc_args ) {
 		list( $object_id, $meta_key ) = $args;
 
 		$meta_value = WP_CLI::get_value_from_arg_or_stdin( $args, 2 );
-		/** @var array<mixed>|string $meta_value */
+		/** @var array|string $meta_value */
 		$meta_value = WP_CLI::read_value( $meta_value, $assoc_args );
 
 		$object_id = $this->check_object_id( $object_id );