update copyright for 2024

Cabal-syntax/Cabal-syntax.cabal

Cabal-syntax/LICENSE

Cabal-tests/Cabal-tests.cabal

Cabal-tests/LICENSE

Cabal/Cabal.cabal

Cabal/LICENSE

LICENSE

cabal-benchmarks/LICENSE

cabal-benchmarks/cabal-benchmarks.cabal

cabal-dev-scripts/LICENSE

cabal-install-solver/LICENSE

cabal-install-solver/cabal-install-solver.cabal

cabal-install/LICENSE

cabal-install/cabal-install.cabal

cabal-testsuite/LICENSE

cabal-testsuite/cabal-testsuite.cabal

doc/conf.py

solver-benchmarks/LICENSE

solver-benchmarks/solver-benchmarks.cabal