docs: use pipN instead of pipX

Author: Mr-Sunglasses

Doc/library/ensurepip.rst

@@ -75,14 +75,14 @@ through two additional command line options:
    for the current Python installation (this option is not permitted inside an
    active virtual environment).
 
-By default, the scripts ``pipX`` and ``pipX.Y`` will be installed (where
-X.Y stands for the version of Python used to invoke ``ensurepip``). The
+By default, the scripts ``pipN`` and ``pipN.Y`` will be installed (where
+N.Y stands for the version of Python used to invoke ``ensurepip``). The
 scripts installed can be controlled through two additional command line
 options:
 
 .. option:: --altinstall
 
-   If an alternate installation is requested, the ``pipX`` script will *not* be
+   If an alternate installation is requested, the ``pipN`` script will *not* be
    installed.
 
 .. option:: --default-pip
@@ -118,10 +118,10 @@ Module API
    *user* indicates whether to use the user scheme rather than installing
    globally.
 
-   By default, the scripts ``pipX`` and ``pipX.Y`` will be installed (where
-   X.Y stands for the current version of Python).
+   By default, the scripts ``pipN`` and ``pipN.Y`` will be installed (where
+   N.Y stands for the current version of Python).
 
-   If *altinstall* is set, then ``pipX`` will *not* be installed.
+   If *altinstall* is set, then ``pipN`` will *not* be installed.
 
    If *default_pip* is set, then ``pip`` will be installed in addition to
    the two regular scripts.