Sync with the rke2 information about embedded registry

Signed-off-by: manuelbuil <[email protected]>

Author: manuelbuil

docs/installation/airgap.md

@@ -2,7 +2,8 @@
 title: "Air-Gap Install"
 ---
 
-You can install K3s in an air-gapped environment using two different methods. An air-gapped environment is any environment that is not directly connected to the Internet. You can either deploy a private registry and mirror docker.io, or you can manually deploy images such as for small clusters.
+K3s can be installed in an air-gapped environment with two different methods. You can either deploy images via the [k3s-airgap-images tarball release artifact](#manually-deploy-images-method) or by using a [private registry](#private-registry-method). It is also possible to use the [embedded registry mirror](#embedded-registry-mirror) as long as there is at least one cluster member that has access to the required images.
+
 
 ## Load Images
 
@@ -43,7 +44,7 @@ This method requires you to manually deploy the necessary images to each node, a
 ### Embedded Registry Mirror
 
 :::info Version Gate
-The Embedded Registry Mirror is available as an experimental feature as of January 2024 releases: v1.26.13+k3s1, v1.27.10+k3s1, v1.28.6+k3s1, v1.29.1+k3s1
+The Embedded Registry Mirror is available as an experimental feature as of January 2024 releases: v1.26.13+k3s1, v1.27.10+k3s1, v1.28.6+k3s1, v1.29.1+k3s1 and GA as of December 2024 releases: v1.29.12+k3s1, v1.30.8+k3s1, v1.31.4+k3s1
 :::
 
 K3s includes an embedded distributed OCI-compliant registry mirror.

docs/installation/registry-mirror.md

@@ -3,11 +3,10 @@ title: "Embedded Registry Mirror"
 ---
 
 :::info Version Gate
-The Embedded Registry Mirror is available as an experimental feature as of January 2024 releases: v1.26.13+k3s1, v1.27.10+k3s1, v1.28.6+k3s1, v1.29.1+k3s1
+The Embedded Registry Mirror is available as an experimental feature as of January 2024 releases: v1.26.13+k3s1, v1.27.10+k3s1, v1.28.6+k3s1, v1.29.1+k3s1 and GA as of December 2024 releases: v1.29.12+k3s1, v1.30.8+k3s1, v1.31.4+k3s1
 :::
 
-K3s embeds [Spegel](https://github.com/spegel-org/spegel), a stateless distributed OCI registry mirror that allows peer-to-peer sharing of container images between nodes in a Kubernetes cluster.
-The distributed registry mirror is disabled by default.
+K3s embeds [Spegel](https://github.com/spegel-org/spegel), a stateless distributed OCI registry mirror that allows peer-to-peer sharing of container images between nodes in a Kubernetes cluster. The distributed registry mirror is disabled by default. For K3s to leverage it, you must enable both the [Distributed OCI Registry Mirror](#enabling-the-distributed-oci-registry-mirror) and the [Registry mirroring](#enabling-registry-mirroring) as explained in the following subsections.
 
 ## Enabling The Distributed OCI Registry Mirror