Bump firebase/php-jwt version to ^6.8 (#1083)

Author: lucasmichot

composer.json

@@ -39,7 +39,7 @@
         "php": "^8.0",
         "ext-json": "*",
         "ext-openssl": "*",
-        "firebase/php-jwt": "^6.2",
+        "firebase/php-jwt": "^6.8",
         "lcobucci/clock": "^2.0 || ^3.0",
         "lcobucci/jwt": "^4.1.5 || ^5.0.0",
         "socialiteproviders/manager": "^4.4"