[O11y][Spring Boot] Lens migration for visualizations to Kibana version 8.1.0 (#5530)

* Lens migration of spring_boot to 8.1.0

* Update changelog

* Resolve merge conflicts

Author: rajvi-patel-22

packages/spring_boot/changelog.yml

@@ -1,4 +1,9 @@
 # newer versions go on top
+- version: "0.8.0"
+  changes:
+    - description: Migrate visualizations to lens.
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/5530
 - version: "0.7.1"
   changes:
     - description: Added categories and/or subcategories.