Fix typo

Co-authored-by: Daria Vladykina <[email protected]>

xml/ha_storage_protection.xml

@@ -1276,7 +1276,7 @@ Illegal request, Invalid opcode</screen>
      Before acquiring protected resources, the node must first acquire the
      protecting lock. The ordering is enforced by Pacemaker. The sfex
      component ensures that even if Pacemaker is subject to a split-brain
-     situation, the lock is never be granted more than once.
+     situation, the lock is never granted more than once.
     </para>
     <para>
      These locks must also be refreshed periodically, so that a node's death