Update documentation

Author: birgits

README.rst

@@ -33,13 +33,13 @@ Go to the `download page <http://readthedocs.org/projects/windpowerlib/downloads
 Installation
 ============
 
-If you have a working Python 3 (>= 3.6) environment, use pypi to install the latest windpowerlib version:
+If you have a working Python 3 environment, use pypi to install the latest windpowerlib version:
 
 ::
 
     pip install windpowerlib
 
-The windpowerlib is designed for Python 3 and tested on Python >= 3.5. We highly recommend to use virtual environments.
+The windpowerlib is designed for Python 3 and tested on Python >= 3.10. We highly recommend to use virtual environments.
 Please see the `installation page <http://oemof.readthedocs.io/en/stable/installation_and_setup.html>`_ of the oemof documentation for complete instructions on how to install python and a virtual environment on your operating system.
 
 Optional Packages

doc/getting_started.rst

@@ -43,7 +43,7 @@ If you have a working Python 3 environment, use pypi to install the latest windp
 
     pip install windpowerlib
 
-The windpowerlib is designed for Python 3 and tested on Python >= 3.5. We highly recommend to use virtual environments.
+The windpowerlib is designed for Python 3 and tested on Python >= 3.10. We highly recommend to use virtual environments.
 Please see the `installation page <http://oemof.readthedocs.io/en/stable/installation_and_setup.html>`_ of the oemof documentation for complete instructions on how to install python and a virtual environment on your operating system.
 
 Optional Packages