qmp: fix spapr example of query-hotpluggable-cpus

27393c33 qapi: keep names in 'CpuInstanceProperties' in sync with struct CPUCore
added -id suffix to property names but forgot to fix example in qmp-commands.hx

Fix example to have 'core-id' instead of 'core' to match current code
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NPeter Krempa <pkrempa@redhat.com>
Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>

qmp-commands.hx

@@ -4978,8 +4978,8 @@ Example for pseries machine type started with
 
 -> { "execute": "query-hotpluggable-cpus" }
 <- {"return": [
-     { "props": { "core": 8 }, "type": "POWER8-spapr-cpu-core",
+     { "props": { "core-id": 8 }, "type": "POWER8-spapr-cpu-core",
        "vcpus-count": 1 },
-     { "props": { "core": 0 }, "type": "POWER8-spapr-cpu-core",
+     { "props": { "core-id": 0 }, "type": "POWER8-spapr-cpu-core",
        "vcpus-count": 1, "qom-path": "/machine/unattached/device[0]"}
    ]}'