examples: systemtap: Update to linux-6.3 (rc1)

examples: systemtap: Update to linux-6.3 (rc1)

The 'vmsa' struct was moved out of 'struct vcpu_svm' into the 'sev_es'
sub-struct in linux commit:

  commit b67a4cc35c9f726999fa29880713ce72d4e39e8d
  Author: Peter Gonda <pgonda@google.com>
  Date:   Thu Oct 21 10:42:59 2021 -0700

      KVM: SEV: Refactor out sev_es_state struct

      Move SEV-ES vCPU metadata into new sev_es_state struct from vcpu_svm.

Also update the line reference to have more margin.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>