Fix collab (#8298)

Co-Authored-By: Marshall <marshall@zed.dev>

We broke it by deploying two servers simultaneously.

Release Notes:

- N/A

Co-authored-by: Marshall <marshall@zed.dev>

crates/collab/k8s/collab.template.yml

@@ -58,7 +58,7 @@ spec:
         - name: ${ZED_SERVICE_NAME}
           image: "${ZED_IMAGE_ID}"
           args:
-            - serve
+            - serve ${ZED_SERVICE_NAME}
           ports:
             - containerPort: 8080
               protocol: TCP