fixed error message in logstash dashboard

default.json

@@ -14,7 +14,7 @@
           ],
           "type": "text",
           "title": "Welcome",
-          "content": "Welcome to Kibana Dashboard, a technology preview of what's to come for Kibana, Logstash and Elasticsearch \n\nKibana dashboard is the easy way to share, build, use and extend interactive, real time dashboards and data analysis interfaces. \n\nReady to get started? \n\nLogstash users, click the 'Load' button to the right, paste this URL:  https://gist.github.com/028ff4b566a936fac019 into the 'Gist' loader, click 'Get' and select the 'Logstash Dashboard' link that appears",
+          "content": "Welcome to Kibana Dashboard, a technology preview of what's to come for Kibana, Logstash and Elasticsearch \n\nKibana dashboard is the easy way to share, build, use and extend interactive, real time dashboards and data analysis interfaces. \n\nReady to get started? \n\nLogstash users, click the 'Load' button to the right, paste this URL:  https://gist.github.com/75428ef74f3b97f31af4 into the 'Gist' loader, click 'Get' and select the 'Logstash Dashboard' link that appears",
           "style": {
             "font-size": "14pt"
           }