Fix a notice when the path is empty

src/Network/Probe.php

@@ -1801,6 +1801,7 @@ class Probe
 
 		$hrefParts = parse_url($href);
 
+		if (!empty($hrefParts['path'])) {
 			// Root path case (/path) including relative scheme case (//host/path)
 			if ($hrefParts['path'] && $hrefParts['path'][0] == '/') {
 				$path = $hrefParts['path'];
@@ -1822,6 +1823,7 @@ class Probe
 
 				$path = '/' . implode('/', $absolutes);
 			}
+		}
 
 		// Relative scheme case (//host/path)
 		$baseParts['host'] = $hrefParts['host'] ?? $baseParts['host'];