Use python3 -m in the readme

Mariatta · web-flow · commit bde2e93cc2a1 · 2018-11-05T09:19:14.000-08:00
diff --git a/README.rst b/README.rst
@@ -13,7 +13,7 @@ Requires Python 3.6
 
 ::
 
-   pip3 install pytaco
+   python3 -m pip install pytaco
 
 Once installed, on the command line, type::
 
