Add changelog

Author: jsoriano

packages/elastic_agent/changelog.yml

@@ -1,5 +1,8 @@
-# newer versions go on top
-
+- version: "2.6.1"
+  changes:
+    - description: Support new pipeline fields from beats logs
+      type: enhancement
+      link: https://github.com/elastic/integrations/pull/15280
 - version: "2.6.0"
   changes:
     - description: Update version requirements due to the breaking change in metric names

packages/elastic_agent/manifest.yml

@@ -1,13 +1,13 @@
 name: elastic_agent
 title: Elastic Agent
-version: 2.6.0
+version: 2.6.1
 description: Collect logs and metrics from Elastic Agents.
 type: integration
 format_version: 3.1.4
 categories: ["elastic_stack"]
 conditions:
   kibana:
-    version: "^8.15.0 || ^9.0.0"
+    version: "^8.11.2 || ^9.0.0"
   elastic:
     subscription: basic
 owner: