Issue #3228806: Exclude security hardened site/default

src/Updater.php

@@ -168,10 +168,10 @@ class Updater {
   }
 
   /**
-   * Gets directories that should be excluded from the staging area.
+   * Gets the paths that should be excluded from the staging area.
    *
    * @return string[]
-   *   The absolute paths of directories to exclude from the staging area.
+   *   The paths relative to the active directory to exclude.
    */
   private function getExclusions(): array {
     $exclusions = [];