Fix standalone agent K8s manifest link to include patch level (#1344) (#1348)

* Fix standalone agent K8s manifest link to include patch level

* Update docs/en/ingest-management/elastic-agent/running-on-kubernetes-standalone.asciidoc

Co-authored-by: Julien Mailleret <[email protected]>

---------

Co-authored-by: Julien Mailleret <[email protected]>
(cherry picked from commit 153b04d)

Co-authored-by: David Kilfoyle <[email protected]>

Author: mergify[bot]

docs/en/ingest-management/elastic-agent/running-on-kubernetes-standalone.asciidoc

@@ -1,7 +1,7 @@
 [[running-on-kubernetes-standalone]]
 = Run {agent} Standalone on Kubernetes
 
-:manifest: https://raw.githubusercontent.com/elastic/elastic-agent/{branch}/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml
+:manifest: https://raw.githubusercontent.com/elastic/elastic-agent/v{bare_version}/deploy/kubernetes/elastic-agent-standalone-kubernetes.yaml
 :show-condition: enabled
 
 == What you need