Update index.php

Author: distantnative

index.php

@@ -17,10 +17,10 @@
 
 // validate Kirby version
 if (
-    version_compare(Kirby::version() ?? '0.0.0', '3.7.0-rc.1', '<') === true ||
+    version_compare(Kirby::version() ?? '0.0.0', '3.7.4', '<=') === true ||
     version_compare(Kirby::version() ?? '0.0.0', '3.9.0', '>=') === true
 ) {
-    throw new Exception('Retour 4.3 supports Kirby 3.7.0 to 3.8.x');
+    throw new Exception('Retour 4.3.1 supports Kirby 3.7.4 to 3.8.x');
 }
 
 // autoload classes