pgsql: Fix the dates of some copyright notices

Fix the dates of some copyright notices

0ad8032 and 4e34747 are at the origin of that.  Julien has found the one
in parse_jsontable.c, while I have spotted the rest.

Author: Julien Rouhaud, Michael Paquier
Discussion: https://postgr.es/m/20220411060838.ftnzyvflpwu6f74w@jrouhaud

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7597cc3083f8b3607123f71bc6432afc5a655d6e

Modified Files
--------------
src/backend/parser/parse_jsontable.c        | 2 +-
src/backend/replication/basebackup_gzip.c   | 2 +-
src/backend/replication/basebackup_lz4.c    | 2 +-
src/backend/replication/basebackup_target.c | 2 +-
src/backend/replication/basebackup_zstd.c   | 2 +-
5 files changed, 5 insertions(+), 5 deletions(-)