RDMA/core: Fix typo in comment

Spelling mistake (triple letters) in comment.
Detected with the help of Coccinelle.

Link: https://lore.kernel.org/r/20220521111145.81697-86-Julia.Lawall@inria.fr
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

include/rdma/ib_verbs.h

@@ -578,7 +578,7 @@ struct rdma_stat_desc {
 /**
  * struct rdma_hw_stats
  * @lock - Mutex to protect parallel write access to lifespan and values
- *    of counters, which are 64bits and not guaranteeed to be written
+ *    of counters, which are 64bits and not guaranteed to be written
  *    atomicaly on 32bits systems.
  * @timestamp - Used by the core code to track when the last update was
  * @lifespan - Used by the core code to determine how old the counters