[O11y][IIS] Migrate Website Overview dashboard visualizations to lens in kibana 8.5.0 (#5726)

* Migrate Website Overview dashboard visualizations to lens

* Update changelog

* Update decimal points

* Update screenshot

Author: rajvi-patel-22

packages/iis/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "1.8.0"
+  changes:
+    - description: Migrate Website Overview dashboard visualizations to lens.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/5726
 - version: "1.7.0"
   changes:
     - description: Migrate Webserver Process Overview dashboard visualizations to lens.