Updates composer dependencies.

commonmark had a security issue.

Author: HugoFara

composer.json

@@ -22,7 +22,7 @@
         "vimeo/psalm": "^5.6",
         "phpunit/phpunit": "^10.0",
         "matthiasmullie/minify": "^1.3",
-        "league/commonmark": "^2.2"
+        "league/commonmark": "^2.6"
     },
     "suggest": {
         "squizlabs/php_codesniffer": "Following code style standards is a good thing"