chore: update readme explain tag changes

Signed-off-by: Chris Privitere <23177737+cprivitere@users.noreply.github.com>

README.md

@@ -16,6 +16,8 @@ This is the official [cluster-api](https://github.com/kubernetes-sigs/cluster-ap
 
 - The API version v1alpha3 has been completely removed in this release. Realistically, this was not used by anyone, but if you were using it, at this point it's likely easier to deploy a fresh cluster than to try to upgrade.
 - We're deprecating --metrics-bind-addr and defaulting to secure communications for the metric server. Please see more info on the [upstream Cluster API PR](https://github.com/kubernetes-sigs/cluster-api/pull/9264).
+- We've changed the tags applied to devices in the Equinix Metal API to start with "capp" instead of "cluster-api-provider-packet". This was done to enable longer cluster and machine names within the 80 character limit of the Equinix Metal API. If you have any automation that relies on the old tags, you'll need to update it.
+- Pursuant to the above, if you have a cluster that is likely to add new nodes WHILE you are upgrading the Cluster API Provider Packet component, add the `cluster.x-k8s.io/paused` annotation to your cluster object. This will pause remediation. Then remember to remove the annotation after the upgrade.
 
 ## Ugrading to v0.7.X