Fixed link to segment & metric doc

Documentation about Segment & Metric is on URL http://www.metabase.com/docs/latest/administration-guide/06-segments-and-metrics.html

frontend/src/metabase/reference/selectors.js

@@ -45,7 +45,7 @@ const referenceSections = {
             message: "Metrics will appear here once your admins have created some",
             image: "/app/img/metrics-list",
             adminAction: "Learn how to create metrics",
-            adminLink: "http://www.metabase.com/docs/latest/administration-guide/05-segments-and-metrics.html"
+            adminLink: "http://www.metabase.com/docs/latest/administration-guide/06-segments-and-metrics.html"
         },
         breadcrumb: "Metrics",
         // mapping of propname to args of dispatch function
@@ -65,7 +65,7 @@ const referenceSections = {
             message: "Segments will appear here once your admins have created some",
             image: "/app/img/segments-list",
             adminAction: "Learn how to create segments",
-            adminLink: "http://www.metabase.com/docs/latest/administration-guide/05-segments-and-metrics.html"
+            adminLink: "http://www.metabase.com/docs/latest/administration-guide/06-segments-and-metrics.html"
         },
         breadcrumb: "Segments",
         fetch: {