Issue #2701027 by Gábor Hojtsy, Sharique, jhodgdon: Drupal 8 UPGRADE.txt is...

Issue #2701027 by Gábor Hojtsy, Sharique, jhodgdon: Drupal 8 UPGRADE.txt is misleading in many ways (in its name to begin with)

README.txt

@@ -36,8 +36,8 @@ thousands of contributed modules (for functionality not included with Drupal
 core) available for download.
 
 More about configuration:
- * Install, upgrade, and maintain Drupal:
-   See INSTALL.txt and UPGRADE.txt in the "core" directory.
+ * Install, update and maintain Drupal:
+   See INSTALL.txt and UPDATE.txt in the "core" directory.
  * Learn about how to use Drupal to create your site:
    https://www.drupal.org/documentation
  * Follow best practices: