Fix BlockThreshold Callback argument conversion once more

The conversion was changed from "OssiiO" to "OssLLO". Unfortunately the
arguments are unsigned long long, where the proper coversion character
is 'K'.

Fixes: https://gitlab.com/libvirt/libvirt-python/-/merge_requests/40
Fixes: fd069ac85c
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1976109
Signed-off-by: Peter Krempa <pkrempa@redhat.com>

libvirt-override.c

@@ -7236,7 +7236,7 @@ libvirt_virConnectDomainEventBlockThresholdCallback(virConnectPtr conn ATTRIBUTE
     /* Call the Callback Dispatcher */
     pyobj_ret = PyObject_CallMethod(pyobj_conn,
                                     (char*)"_dispatchDomainEventBlockThresholdCallback",
-                                    (char*)"OssLLO",
+                                    (char*)"OssKKO",
                                     pyobj_dom, dev, path, threshold, excess,
                                     pyobj_cbData);