MINOR: [C++][CI] Unpin CMake
MINOR: [C++][CI] Unpin CMake

CMake >=3.22.3 fixes the error causing us to pin the CMake version
(see https://gitlab.kitware.com/cmake/cmake/-/issues/22524).

Closes #12638 from lidavidm/minor-cmake-ver

Authored-by: David Li <dc24f9cfc84fb1675ce65c8444a2c3e2f0e5f297@gmail.com>
Signed-off-by: Antoine Pitrou <9359a4d812173b65a3a0094cd86363e79731a3c2@python.org>

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