fix: ignore some psalm issues

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>

Author: julien-nc

lib/Service/AssistantService.php

@@ -285,6 +285,9 @@ public function getAvailableTaskTypes(): array {
 			// skip chat, chat with tools and ContextAgent task types (not directly useful to the end user)
 			if (!self::DEBUG) {
 				// this appeared in 33, this is true if the task type class extends the IInternalTaskType
+				/**
+				 * @psalm-suppress InvalidArrayOffset,TypeDoesNotContainType
+				 */
 				if ($taskTypeArray['isInternal'] ?? false) {
 					continue;
 				}