[Pulse Connect Secure] Add overview dashboard (elastic#13747)

Currently, the integration does not include the support of dashboard hence added dashboards
in the integration to get better visualization of the data.

Author: moxarth-rathod

packages/pulse_connect_secure/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "2.6.0"
+  changes:
+    - description: Add dashboard.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/13747
 - version: "2.5.0"
   changes:
     - description: Update Kibana constraint to support 9.0.0.