Mention reqirements for AL2 selinux (#271)

Signed-off-by: Derek Nola <derek.nola@suse.com>

docs/security/selinux.md

@@ -9,7 +9,7 @@ for the non-standard location(s) which containerd is installed and places persis
 
 Note: In some circumstances, a reboot of the node may be required after installing the rke2-selinux package and before starting the rke2 service. If you encounter denials in your selinux audit log despite installation of the rke2-selinux and container-selinux packages, please reboot the node.
 
-#### Custom Context Labels
+### Custom Context Labels
 
 RKE2 runs control-plane services as static pods which require access to multiple
 [`container_var_lib_t`](https://github.com/containers/container-selinux/blob/RHEL7.5/container.te#L59)
@@ -21,7 +21,21 @@ introduces the [`rke2_service_db_t`](https://github.com/rancher/rke2-selinux/blo
 [`rke2_service_t`](https://github.com/rancher/rke2-selinux/blob/v0.3.latest.1/rke2.te#L9-L13) context labels for
 read-write and read-only access, respectively. These labels will only be applied to the RKE2 control-plane static pods.  
 
-#### Configuration
+### Specific OS Requirements
+
+<Tabs groupId="os-reqs" queryString>
+<TabItem value="Amazon Linux 2">
+Amazon Linux 2 requires additional selinux packages to be installed:
+
+```bash
+sudo amazon-linux-extras enable selinux-ng; sudo yum install selinux-policy-targeted -y
+```
+
+</TabItem>
+</Tabs>
+
+
+### Configuration
 
 RKE2 support for SELinux amounts to a single configuration item, the `--selinux` boolean flag. This is a pass-through
 to the [`enable_selinux` boolean in the cri section of the containerd/cri toml](https://github.com/containerd/cri/blob/release/1.4/docs/config.md).