Update composer.json

Fixes #38

Author: davidmaack

composer.json

@@ -19,7 +19,7 @@
         "source":"https://github.com/menatwork/semantic_html5"
     },
     "require":{
-        "php": "^7.2 || ^8.1",
+        "php": "^7.2 || ^8.0",
         "contao/core-bundle": "^4.4.8",
         "menatwork/contao-multicolumnwizard-bundle": "^3.4"
     },