Update Examples in Logical Replication Docs

Hi,

While going through the example for column lists [1] and row filters
[2] in logical replication, I found that the output of "\dRp+" is not
updated as per PostgreSQL 18. In PG 18, a new column "Generated
columns' was added in "\dRp+" by commit [3], so I think we should
update the docs to reflect the same. I have attached a patch with the
changes.
The changes apply to both the branches REL_18_STABLE and HEAD.

[1]: https://www.postgresql.org/docs/current/logical-replication-col-lists.html
[2]: https://www.postgresql.org/docs/current/logical-replication-row-filter.html
[3]:https://github.com/postgres/postgres/commit/7054186c4ebe24e63254651e2ae9b36efae90d4e

Thanks,
Shlok Kyal