[regression] Wrong doc link on database update page

Problem/Motivation

#3182405: Do not use verb "Install" for things other than turning on modules/themes changed the link on update.php to direct to a Drupal 7 page. That was committed to 10.1.0. I discovered while working on #3414666: Improve text on database update page

Setting 'critical' because this is a significant regressions in user experience, developer experience, or documentation.

Steps to reproduce

Proposed resolution

Remaining tasks

Revert the link part of this change

-      '#markup' => '<p>' . $this->t('Use this utility to update your database whenever a new release of Drupal or a module is installed.') . '</p><p>' . $this->t('For more detailed information, see the <a href="https://www.drupal.org/docs/updating-drupal">Updating Drupal guide</a>. If you are unsure what these terms mean you should probably contact your hosting provider.') . '</p>',
+      '#markup' => '<p>' . $this->t('Use this utility to update your database whenever a module, theme, or the core software is updated.') . '</p><p>' . $this->t('For more detailed information, see the <a href="https://www.drupal.org/upgrade">upgrading handbook</a>. If you are unsure what these terms mean you should probably contact your hosting provider.') . '</p>',
     ];

User interface changes

Introduced terminology

API changes

Data model changes

Release notes snippet