Example output has extra end curly bracket. Switch with comma.

Signed-off-by: Victor Toso <victortoso@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
---
 qapi/machine.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/qapi/machine.json b/qapi/machine.json
index a08b6576ca..9eb76193e0 100644
--- a/qapi/machine.json
+++ b/qapi/machine.json
@@ -1684,7 +1684,7 @@
 #
 # Example:
 #
-# -> { "execute": "dumpdtb" }
+# -> { "execute": "dumpdtb",
 #      "arguments": { "filename": "fdt.dtb" } }
 # <- { "return": {} }
 ##
-- 
2.41.0