pgsql: Fix typo and comments related to the recent no-wait lock improve

Fix typo and comments related to the recent no-wait lock improvements

The argument of dontWait at the top of ProcSleep() was documented
backwards, and there was a typo in lock.c.

Thinkos in 2346df6fc373.

Author: Will Mortensen
Reviewed-by: Jingxian Li, Michael Paquier
Discussion: https://postgr.es/m/CAMpnoC5f+eiS7tdy8PUpd_LacSTVT-pYpVooKfjHRQQmkHPZ2g@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/f7ab71ba0c7bcf237403d40269aeea0a0f2551df

Modified Files
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src/backend/storage/lmgr/lock.c | 2 +-
src/backend/storage/lmgr/proc.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)