add ecctl to release notes nav

Author: shainaraskas

src/tooling/docs-assembler/navigation.yml

@@ -103,12 +103,14 @@ toc:
       # https://github.com/elastic/docs-content/blob/main/release-notes/elastic-cloud-serverless/toc.yml
       - toc: docs-content://release-notes/elastic-cloud-serverless
         path_prefix: release-notes/cloud-serverless
+
       # Cloud Hosted
       # https://github.com/elastic/cloud/blob/master/docs/release-notes/cloud-hosted/toc.yml
       # We probably need to add `max_toc_depth: 2` to
       # https://github.com/elastic/cloud/blob/master/docs/docset.yml
       - toc: cloud://release-notes/cloud-hosted
         path_prefix: release-notes/cloud-hosted
+        
       # Cloud Enterprise
       # https://github.com/elastic/cloud/blob/master/docs/release-notes/cloud-enterprise/toc.yml
       - toc: cloud://release-notes/cloud-enterprise
@@ -204,6 +206,11 @@ toc:
       - toc: ecs://release-notes
         path_prefix: release-notes/ecs
 
+      # ECCTL
+      # https://github.com/elastic/ecctl/blob/master/docs/release-notes/toc.yml
+      - toc: ecctl://release-notes
+        path_prefix: release-notes/ecctl
+
   #############
   # REFERENCE #
   #############