fix: changed default value for metrics to be empty string to prevent …

…modal layout error (#2787)

src/Screen/Layouts/Metric.php

@@ -44,7 +44,7 @@ public function build(Repository $repository)
             return;
         }
 
-        $metrics = collect($this->labels)->map(fn (string $value) => $repository->getContent($value, []));
+        $metrics = collect($this->labels)->map(fn (string $value) => $repository->getContent($value, ''));
 
         return view($this->template, [
             'title'   => $this->title,