Fix wrong reference to S3 deployer namespace

Author: john-shaffer

src/S3/Deployer.php

@@ -193,7 +193,7 @@ public function uploadFilesIter( \Iterator $files ): void {
 
                 $is_cached = DeployCache::fileisCached(
                     $cache_key,
-                    $this->namespace,
+                    self::DEFAULT_NAMESPACE,
                     $hash,
                 );
 
@@ -231,7 +231,7 @@ function ( $result, $iter_key, $promise ) use ( &$items_by_iter_key ) {
                     $item = $items_by_iter_key[ $iter_key ];
                     DeployCache::addFile(
                         $item['cache_key'],
-                        $this->namespace,
+                        self::DEFAULT_NAMESPACE,
                         $item['hash']
                     );
                     $this->addCfPath( $item['cache_key'] );