ignore CVE that breaks unit tests in Github actions

see: https://github.com/firebase/php-jwt/issues/620

composer.json

@@ -43,6 +43,11 @@
 		}
 	},
 	"config" : {
+		"audit": {
+			"ignore": {
+				"CVE-2025-45769": "disputed on the basis that key lengths are expected to be set by an application, not by this library"
+			}
+		},
 		"autoloader-suffix" : "DontChange",
 		"optimize-autoloader": true,
 		"preferred-install": "dist",