Issue #3311472 Set minimum stability for form

Closes #3311472

src/Validator/VersionPolicy/TargetVersionNotPreRelease.php

@@ -33,7 +33,7 @@ final class TargetVersionNotPreRelease {
   public function validate(string $installed_version, ?string $target_version): array {
     if (!in_array(VersionParser::parseStability($target_version), ['stable', 'RC'], TRUE)) {
       return [
-        $this->t('Drupal cannot be automatically updated during cron to the recommended version, @target_version, because it is not a stable version.', [
+        $this->t('Drupal cannot be updated to the recommended version, @target_version, because it is not a stable version.', [
           '@target_version' => $target_version,
         ]),
       ];