docs: fix a typo in bandwidth column name

Signed-off-by: Ihar Hrachyshka <ihrachys@redhat.com>
Signed-off-by: Mark Michelson <mmichels@redhat.com>

ovn-nb.xml

@@ -2357,9 +2357,9 @@
       <ref column="match"/> with the highest-<ref column="priority"/>
       will have QoS applied to it.  If the <ref column="action"/> column is
       specified, then matching packets will have DSCP marking applied.
-      If the <ref column="bandwdith"/> column is specified, then matching
+      If the <ref column="bandwidth"/> column is specified, then matching
       packets will have metering applied.  <ref column="action"/> and
-      <ref column="bandwdith"/> are not exclusive, so both marking and
+      <ref column="bandwidth"/> are not exclusive, so both marking and
       metering by defined for the same QoS entry. If no row matches,
       packets will not have any QoS applied.
     </p>