chore: update docs to reflect 0.5.1

docs/Integrated-Mode.md

@@ -34,7 +34,7 @@ Here is what a sample Docker Compose deployment would look like:
 services:
   headplane:
     # I recommend you pin the version to a specific release
-    image: ghcr.io/tale/headplane:0.5.0
+    image: ghcr.io/tale/headplane:0.5.1
     container_name: headplane
     restart: unless-stopped
     ports:
@@ -148,7 +148,7 @@ spec:
       serviceAccountName: default
       containers:
       - name: headplane
-        image: ghcr.io/tale/headplane:0.5.0
+        image: ghcr.io/tale/headplane:0.5.1
         env:
         # Set these if the pod name for Headscale is not static
         # We will use the downward API to get the pod name instead