chore: updated copyright to 2024

LICENSE

birdclient/__init__.py

birdclient/exceptions.py

birdclient/version.py

tests/__init__.py

tests/basetests.py

tests/conftest.py

tests/t10_status/__init__.py

tests/t10_status/test_show_status.py

tests/t20_tables/__init__.py

tests/t20_tables/t10_direct/__init__.py

tests/t20_tables/t10_direct/test_show_t_direct4.py

tests/t20_tables/t10_direct/test_show_t_direct6.py

tests/t20_tables/t20_kernel/__init__.py

tests/t20_tables/t20_kernel/test_show_t_kernel4.py

tests/t20_tables/t20_kernel/test_show_t_kernel6.py

tests/t20_tables/t30_static/__init__.py

tests/t20_tables/t30_static/test_show_t_static4.py

tests/t20_tables/t30_static/test_show_t_static6.py

tests/t20_tables/t40_rip/__init__.py