Fix typo (cetificate -> certificate)

Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

docs/manpages/virsh.rst

@@ -3182,7 +3182,7 @@ Providing *--tls* causes the migration to use the host configured TLS setup
 the migration of the domain. Usage requires proper TLS setup for both source
 and target. Normally the TLS certificate from the destination host must match
 +the host's name for TLS verification to succeed. When the certificate does not
-+match the destination hostname and the expected cetificate's hostname is
++match the destination hostname and the expected certificate's hostname is
 +known, *--tls-destination* can be used to pass the expected *hostname* when
 +starting the migration.
 

include/libvirt/libvirt-domain.h

@@ -1059,7 +1059,7 @@ typedef enum {
  *
  * Normally the TLS certificate from the destination host must match the host's
  * name for TLS verification to succeed. When the certificate does not match
- * the destination hostname and the expected cetificate's hostname is known,
+ * the destination hostname and the expected certificate's hostname is known,
  * this parameter can be used to pass this expected hostname when starting
  * the migration.
  */