Comment typo in recent push

There seems to be a comment typo in the recent commit "Perform logical
replication actions as the table owner" [1].

/*
 * Switch back to the original user ID.
 *
 * If we created a new GUC nest level, also role back any changes that were
 * made within it.
 */


/role back/rollback/

~~

PSA a tiny patch to fix that.

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[1] https://github.com/postgres/postgres/commit/1e10d49b65d6c26c61fee07999e4cd59eab2b765

Kind Regards,
Peter Smith.
Fujitsu Australia