[Internal]: Steps to download Elastic Agent manifest should link to a release

[ebeahan]

Description

The manifest URL used in the example in reference/fleet/running-on-kubernetes-managed-by-fleet.md points to the main branch in the Elastic Agent repo:

curl -L -O https://raw.githubusercontent.com/elastic/elastic-agent/master/deploy/kubernetes/elastic-agent-managed-kubernetes.yaml

We should guide users to use a tagged release, e.g.:

https://github.com/elastic/elastic-agent/blob/v%7Bagent_version%7D/deploy/kubernetes/elastic-agent-managed-kubernetes.yaml

Resources

See internal thread here.

Which documentation set does this change impact?

Elastic On-Prem and Cloud (all)

Feature differences

The feature is identical in all deployment models.

What release is this request related to?

N/A

Serverless release

N/A

Collaboration model

The documentation team

Point of contact.

Main contact: @ebeahan

Stakeholders: @pkoutsovasilis

[ebeahan]

cc @karenzone