Fix relative datetime link

src/Form/SettingsForm.php

@@ -141,7 +141,7 @@ class SettingsForm extends ConfigFormBase {
         '#title' => $this->t('Time elapsed'),
         '#description' => $this->t('
           <p>Time threshold is relative to "<em>now</em>". For example "<em>-1 month</em>" would prevent any checks that occurred less than a month ago.</p>
-          <p>Check <a href="https://www.php.net/manual/en/datetime.formats.relative.php">Relative Formats</a> for acceptable values</p>
+          <p>Check <a href="https://www.php.net/manual/en/datetime.formats.php#datetime.formats.relative">Relative Formats</a> for acceptable values</p>
         '),
         '#default_value' => $config->get(static::THRESHOLD) ?: '-1 month',
         '#element_validate' => [