Fixed PHPstan detection.

VERSION

@@ -1 +1 @@
-0.2503.122121
+0.2503.142326

tests/HttpFormContentTest.php

@@ -1,7 +1,7 @@
 <?php
 // HttpFormContentTest.php
 // Created: 2025-03-12
-// Updated: 2025-03-12
+// Updated: 2025-03-14
 
 declare(strict_types=1);
 
@@ -133,6 +133,7 @@ final class HttpFormContentTest extends TestCase {
         $this->assertEquals('image/png', $the2->getHeaderLine('Content-Type'));
         $this->assertEquals('image/png', $the2->getClientMediaType());
         $the2Path = tempnam(sys_get_temp_dir(), 'ndx-test-');
+        $this->assertIsString($the2Path);
         $the2->moveTo($the2Path);
         $this->assertEquals($the2Hash, hash_file('sha256', $the2Path));
     }