Add link to latest release in installation.md (argoproj#6509)

Signed-off-by: Sebastian Nyberg <[email protected]>

USERS.md

@@ -118,6 +118,7 @@ Currently, the following organizations are **officially** using Argo Workflows:
 1. [SAP Hybris](https://cx.sap.com/)
 1. [SAS](https://www.sas.com/)
 1. [Schlumberger](https://slb.com/)
+1. [Securitas](https://securitas.com/)
 1. [SegmentStream](https://segmentstream.com)
 1. [Sendible](https://sendible.com)
 1. [Sidecar Technologies](https://hello.getsidecar.com/)

docs/installation.md

@@ -8,7 +8,7 @@ You can choose one of three common installations:
 
 ## Recommendations
 
-* Make sure you're using the manifests attached to the release.
+* Make sure you're using the manifests attached to each Github release. See [this link](https://github.com/argoproj/argo-workflows/releases/latest) for the most recent manifests.
 * Read the [upgrading guide](upgrading.md) before any major upgrade to be aware of breaking changes.
 * If you are using GitOps, copy the manifests into your repository, rather use `base` to reference them. Fewer issues
  regarding network loss, and you'll be able to check what has changed each time you upgrade.