[PATCH trivial] vnc: spelling fix (enable->enabled)

[Michael Tokarev]

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/ui/vnc.c b/ui/vnc.c
index 456db47d71..2bea46b2b3 100644
--- a/ui/vnc.c
+++ b/ui/vnc.c
@@ -598,3 +598,3 @@ bool vnc_display_reload_certs(const char *id, Error **errp)
     if (!vd->tlscreds) {
-        error_setg(errp, "vnc tls is not enable");
+        error_setg(errp, "vnc tls is not enabled");
         return false;