fix: use correct composer config cache folders

lib/QUI/Package/Manager.php

@@ -451,7 +451,7 @@ protected function createComposerJSON(array $packages = [])
         }
 
         $composerJson->config->{"vendor-dir"} = rtrim(OPT_DIR, DIRECTORY_SEPARATOR);
-        $composerJson->config->{"cache-dir"} = $this->varDir . 'cache';
+        $composerJson->config->{"cache-dir"} = $this->varDir;
         $composerJson->config->{"component-dir"} = OPT_DIR . 'bin';
         $composerJson->config->{"quiqqer-dir"} = CMS_DIR;
         $composerJson->config->{"secure-http"} = true;