Update ThemeGeneratorTypes.php for Core Requirment issue#3330032

at_theme_generator/src/Theme/ThemeGeneratorTypes.php

@@ -87,7 +87,7 @@ class ThemeGeneratorTypes extends ThemeGenerator {
     $info['subtheme type']            = 'adaptive_subtheme';
     $info['layout']                   = $this->layout_library;
     $info['description']              = $this->infoYmlDescription($desc);
-    $info['core_version_requirement'] = '^8 || ^9 || ^10';
+    $info['core_version_requirement'] = '^9.3 || ^10';
     $info['regions']                  = $this->info['regions'];
     $info['tags']                     = 'adaptivetheme sub-theme';
     $info['libraries-extend']         = ['quickedit/quickedit' => [$this->machine_name . '/quickedit']];