Upgrade symfony scheduler (#326)

Author: mcop1

composer.json

@@ -24,7 +24,7 @@
     "pimcore/opensearch-client": "^2.0",
     "pimcore/elasticsearch-client": "^2.0",
     "doctrine/orm": "^3.0",
-    "symfony/scheduler": "^6.4"
+    "symfony/scheduler": "^6.4 || ^7.2"
   },
   "require-dev": {
     "roave/security-advisories": "dev-latest",