fix: correct volume name from rook-plugin to headlamp-kube-vip-plugin

The deploy script had hardcoded 'rook-plugin' as the volume name
but should be 'headlamp-kube-vip-plugin' to match the ConfigMap.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

scripts/deploy-e2e-headlamp.sh

@@ -121,11 +121,11 @@ spec:
             initialDelaySeconds: 10
             periodSeconds: 10
           volumeMounts:
-            - name: rook-plugin
+            - name: headlamp-kube-vip-plugin
               mountPath: /headlamp/plugins/headlamp-kube-vip
               readOnly: true
       volumes:
-        - name: rook-plugin
+        - name: headlamp-kube-vip-plugin
           configMap:
             name: headlamp-kube-vip-plugin
 ---