[8.x] Support retrieving URL for Sftp adapter (#36120)

* Support retrieving URL for Sftp adapter

* CS Fix

* Update FilesystemAdapter.php

Co-authored-by: Taylor Otwell <taylor@laravel.com>

src/Illuminate/Filesystem/FilesystemAdapter.php

@@ -20,6 +20,7 @@
 use League\Flysystem\FileExistsException;
 use League\Flysystem\FileNotFoundException;
 use League\Flysystem\FilesystemInterface;
+use League\Flysystem\Sftp\SftpAdapter as Sftp;
 use PHPUnit\Framework\Assert as PHPUnit;
 use Psr\Http\Message\StreamInterface;
 use RuntimeException;
@@ -449,7 +450,7 @@ public function url($path)
             return $this->driver->getUrl($path);
         } elseif ($adapter instanceof AwsS3Adapter) {
             return $this->getAwsUrl($adapter, $path);
-        } elseif ($adapter instanceof Ftp) {
+        } elseif ($adapter instanceof Ftp || $adapter instanceof Sftp) {
             return $this->getFtpUrl($path);
         } elseif ($adapter instanceof LocalAdapter) {
             return $this->getLocalUrl($path);