message: Update release note accordingly to c++17 new standard
diff: @@ -9,8 +9,8 @@ Below is a list of changes made since GUDHI 3.6.0:
  - [Module](link)
  - ...
  -- [Module](link)
  - - ...
  +- Installation
  + - c++17 is the new minimal standard to compile the library. This implies Visual Studio minimal version is now 2017.
  - Miscellaneous
  - The [list of bugs that were solved since GUDHI-3.6.0](https://github.com/GUDHI/gudhi-devel/issues?q=label%3A3.7.0+is%3Aclosed) is available on GitHub.
  