[Doc] Tiny fix for regression tests example

Hi

When reading PG DOC, found some example code not correct as it said.

https://www.postgresql.org/docs/devel/regress-run.html

Here's a tiny fix in regress.sgml.

-make check PGOPTIONS="-c log_checkpoints=on -c work_mem=50MB"

+make check PGOPTIONS="-c geqo=off -c work_mem=50MB"

log_checkpoints couldn't be set in PGOPTIONS.

Replace log_checkpoints with geqo in the example code.

-make check EXTRA_REGRESS_OPTS="--temp-config=test_postgresql.conf"

+make check EXTRA_REGRESS_OPTS="--temp-config=$(pwd)/test_postgresql.conf"

User needs to specify $(pwd) to let the command execute as expected.

The above example code is added by Peter in PG14. So I think we need to apply this fix at PG14/master.

I proposed this fix at pgsql-docs@lists.postgresql.org at [1]. But no reply except Craig. So I please allow me to post the patch at Hackers’ mail list again in case the fix is missed.

[1] https://www.postgresql.org/message-id/OS0PR01MB6113FA937648B8F7A372359BFB009%40OS0PR01MB6113.jpnprd01.prod.outlook.com

Regards,

Tang