pgsql: Fix incorrect year in some copyright notices added this year

Fix incorrect year in some copyright notices added this year

A few patches that were written <= 2023 and committed in 2024 still
contained 2023 copyright year.  Fix that.

Discussion: https://postgr.es/m/CAApHDvr5egyW3FmHbAg-Uq2p_Aizwco1Zjs6Vbq18KqN64-hRA@mail.gmail.com

Branch
------
master

Details
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https://git.postgresql.org/pg/commitdiff/8cb653b2457c75d58c4dba578570ba52301c8b78

Modified Files
--------------
src/backend/postmaster/launch_backend.c           | 2 +-
src/backend/tcop/backend_startup.c                | 2 +-
src/common/unicode/case_test.c                    | 2 +-
src/common/unicode/generate-unicode_case_table.pl | 4 ++--
src/common/unicode_case.c                         | 2 +-
src/include/common/unicode_case.h                 | 2 +-
src/include/common/unicode_case_table.h           | 2 +-
src/include/tcop/backend_startup.h                | 2 +-
8 files changed, 9 insertions(+), 9 deletions(-)