Improve application description for website (#2658)

Author: tremor021

json/graylog.json

@@ -12,7 +12,7 @@
     "documentation": "https://go2docs.graylog.org/current/home.htm",
     "website": "https://graylog.org/",
     "logo": "https://raw.githubusercontent.com/selfhst/icons/refs/heads/main/svg/graylog.svg",
-    "description": "Graylog is a free and open log management platform.",
+    "description": "Graylog is an open-source log management and analysis platform that centralizes and processes log data from various sources, enabling real-time search, analysis, and alerting for IT infrastructure monitoring and troubleshooting.",
     "install_methods": [
         {
             "type": "default",