docs: Reword sentence on WireGuard limitation

Two users of Cilium reported being confused by this sentence. Reword it
a bit in an attempt to clarify by using the term 'node' instead of 'host'
and turning the sentence around.

Signed-off-by: Paul Chaignon <paul@cilium.io>

Documentation/gettingstarted/encryption-wireguard.rst

@@ -217,9 +217,9 @@ WireGuard support in Cilium currently lacks the following features,
 which may be resolved in upcoming Cilium releases:
 
  - Host-level encryption. Only traffic between two Cilium-managed endpoints
-   (i.e. pod to pod traffic) is encrypted. Traffic between a Cilium-managed
-   pod and a remote host, or traffic between two hosts running the Cilium
-   agent will currently not be encrypted.
+   (i.e. pod-to-pod traffic) is encrypted. Traffic between two nodes and
+   traffic between a Cilium-managed pod and a remote node currently won't be
+   encrypted.
  - L7 policy enforcement and visibility
  - eBPF-based host routing