Update CMAKE version requirement in documentation (#465)

Signed-off-by: Alejandro Saucedo <alejandro.saucedo@zalando.de>

Author: axsaucedo

docs/overview/python-package.rst

@@ -14,7 +14,7 @@ Package Installation
 
 Make sure you have the following dependencies installed:
 
-* CMAKE v3.41+ (install in `Windows <https://tulip.labri.fr/TulipDrupal/?q=node/1081>`_, `Linux (Ubuntu) <https://vitux.com/how-to-install-cmake-on-ubuntu-18-04/>`_, `Mac <https://medium.com/r?url=https%3A%2F%2Fstackoverflow.com%2Fa%2F59825656%2F1889253>`_)
+* CMAKE v3.4.1+ (install in `Windows <https://tulip.labri.fr/TulipDrupal/?q=node/1081>`_, `Linux (Ubuntu) <https://vitux.com/how-to-install-cmake-on-ubuntu-18-04/>`_, `Mac <https://medium.com/r?url=https%3A%2F%2Fstackoverflow.com%2Fa%2F59825656%2F1889253>`_)
 * Vulkan SDK installed via `official website <https://vulkan.lunarg.com/sdk/home>`_
 * C++ compiler (eg. gcc for linux / mac, MSVC for Windows)