diff -u b/core/modules/update/src/UpdateProcessor.php b/core/modules/update/src/UpdateProcessor.php
--- b/core/modules/update/src/UpdateProcessor.php
+++ b/core/modules/update/src/UpdateProcessor.php
@@ -176,8 +176,8 @@
       // @todo Purge release data we don't need. See
       //   https://www.drupal.org/node/238950.
       if (!empty($available)) {
-        // The title is escaped in the XML from drupal.org and the fetch
-        // process will encode it again. Therefor, it is decoded here.
+        // The title is escaped in the XML from Drupal.org and the fetch
+        // process will encode it again. Therefore, it is decoded here.
         $available['title'] = Html::decodeEntities($available['title']) ?? '';
         // Only if we fetched and parsed something sane do we return success.
         $success = TRUE;