[3.7]Documentation minor update related to 3.6 - 3.7 migration (GH-9501)



Change version from 3.6 to 3.7 in the documentation when it addresses newcomers.

original request from python/python-docs-fr#273
diff --git a/Doc/tutorial/interpreter.rst b/Doc/tutorial/interpreter.rst
index a2766e8..6812f64 100644
--- a/Doc/tutorial/interpreter.rst
+++ b/Doc/tutorial/interpreter.rst
@@ -24,11 +24,11 @@
 popular alternative location.)
 
 On Windows machines, the Python installation is usually placed in
-:file:`C:\\Python36`, though you can change this when you're running the
+:file:`C:\\Python37`, though you can change this when you're running the
 installer.  To add this directory to your path,  you can type the following
 command into the command prompt in a DOS box::
 
-   set path=%path%;C:\python36
+   set path=%path%;C:\python37
 
 Typing an end-of-file character (:kbd:`Control-D` on Unix, :kbd:`Control-Z` on
 Windows) at the primary prompt causes the interpreter to exit with a zero exit