Fix CMake deprecation warning

[s-barannikov]

Recent versions of CMake issue a deprecation warning:

CMake Deprecation Warning at CMakeLists.txt: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.

Silence this warning by using a ...<max> suffix
in cmake_minimum_required invocation.
No functional change intended.

[CLAassistant]

All committers have signed the CLA.

[MathiasMagnus]

It's a good change.

[bashbaug]

@MathiasMagnus should we be making similar changes to any of our other repos (e.g. OpenCL ICD loader, OpenCL SDK)? If so, how do you want to track this?

[MathiasMagnus]

Our CI/CD changes sport a similar change (and will conflict with this one, but we'll fix), so the other repos will get similar treatment without any special care.