pessimistic trx: cleanup wording (#3475)
pessimistic trx: cleanup wording (#3475)

* pessimistic trx: cleanup wording

* Update pessimistic-transaction.md

* Update pessimistic-transaction.md

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>

* Update pessimistic-transaction.md

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>

* Update pessimistic-transaction.md

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>

* Update pessimistic-transaction.md

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>

Co-authored-by: Lilian Lee <c684465c17314189c18707959627e2ec4fdec2d0@pingcap.com>
pingcap/docs,pingcap/docs,pingcap/docs