[Filesystem] Update some PHPDoc of the Path class

Author: javiereguiluz

Path.php

@@ -585,31 +585,31 @@ public static function isLocal(string $path): bool
      * into forward slashes.
      *
      * ```php
-     * $basePath = Path::getLongestCommonBasePath([
+     * $basePath = Path::getLongestCommonBasePath(
      *     '/symfony/css/style.css',
      *     '/symfony/css/..'
-     * ]);
+     * );
      * // => /symfony
      * ```
      *
      * The root is returned if no common base path can be found:
      *
      * ```php
-     * $basePath = Path::getLongestCommonBasePath([
+     * $basePath = Path::getLongestCommonBasePath(
      *     '/symfony/css/style.css',
      *     '/puli/css/..'
-     * ]);
+     * );
      * // => /
      * ```
      *
      * If the paths are located on different Windows partitions, `null` is
      * returned.
      *
      * ```php
-     * $basePath = Path::getLongestCommonBasePath([
+     * $basePath = Path::getLongestCommonBasePath(
      *     'C:/symfony/css/style.css',
      *     'D:/symfony/css/..'
-     * ]);
+     * );
      * // => null
      * ```
      */