README: update required python version

README.md

@@ -15,7 +15,7 @@ In addition, three Jupyter notebooks are available:
 
 ## Requirements
 
-- [python3](https://www.python.org/) (3.7 or later)
+- [python3](https://www.python.org/) (3.10 or later)
 - [matplotlib](https://matplotlib.org/)
 
 - [nifty8](https://gitlab.mpcdf.mpg.de/ift/nifty/-/tree/NIFTy_8)
@@ -41,4 +41,4 @@ To get started with the packages, take a look at the projects homepages:
 - [https://ift.pages.mpcdf.de/nifty/](https://ift.pages.mpcdf.de/nifty/)
 - [ift.pages.mpcdf.de/resolve](https://ift.pages.mpcdf.de/resolve)
 
-Additionally, the package `nifty` provides a variety of explanatory examples for imaging and general Bayesian inference tasks. See [demos](https://gitlab.mpcdf.mpg.de/ift/nifty/-/tree/NIFTy_8/demos) for more information.
\ No newline at end of file
+Additionally, the package `nifty` provides a variety of explanatory examples for imaging and general Bayesian inference tasks. See [demos](https://gitlab.mpcdf.mpg.de/ift/nifty/-/tree/NIFTy_8/demos) for more information.