Update src/Entities/Blocks/Block.php

Co-authored-by: JohGuentner <3506359+johguentner@users.noreply.github.com>

Author: mechelon

src/Entities/Blocks/Block.php

@@ -216,7 +216,7 @@ private static function mapTypeToClass(string $type): string
     protected static function assertValidTextContent($textContent)
     {
         if (! is_array($textContent) && ! is_string($textContent)) {
-            throw new HandlingException('$textContent content must be a string.');
+            throw new HandlingException('$textContent content must be a string or an array.');
         }
     }
 }