Bump IRIS to latest

Author: ninty9notout

composer.json

@@ -14,7 +14,7 @@
 	],
 	"require": {
         "php": "^8.1",
-        "ozdemirburak/iris": "^2.5.0",
+        "ozdemirburak/iris": "^3.1",
         "silverstripe/framework": "^5.1"
     },
     "autoload": {