cmake minimum version required

[pnorbert]

cmake 3.27.6 says

CMake Deprecation Warning at /opt/adios2/lib/cmake/adios2/adios2-config.cmake:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.
Call Stack (most recent call first):
  CMakeLists.txt:67 (find_package)