Fix PHPStan errors

Author: fabpot

src/Extension/CoreExtension.php

@@ -423,7 +423,6 @@ public static function cycle($values, $position): mixed
 
             if (!is_countable($values)) {
                 throw new RuntimeError('The "cycle" function expects a countable sequence as first argument.');
-                $values = self::toArray($values, false);
             }
         }
 

src/Node/Expression/ArrayExpression.php

@@ -71,7 +71,7 @@ public function isSequence(): bool
     {
         foreach ($this->getKeyValuePairs() as $i => $pair) {
             $key = $pair['key'];
-            if ($key instanceof TempNameExpression) {
+            if ($key instanceof LocalVariable) {
                 $keyValue = $key->getAttribute('name');
             } elseif ($key instanceof ConstantExpression) {
                 $keyValue = $key->getAttribute('value');