block: fix comment typo in submit_bio of block-core.c.

This patch fix a comment typo in block-core.c.

Signed-off-by: Ping-Xiang Chen <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

block/blk-core.c

···
  *
  * The success/failure status of the request, along with notification of
  * completion, is delivered asynchronously through the ->bi_end_io() callback
- * in @bio.  The bio must NOT be touched by thecaller until ->bi_end_io() has
+ * in @bio.  The bio must NOT be touched by the caller until ->bi_end_io() has
  * been called.
  */
 void submit_bio(struct bio *bio)