Update further README references from 3.10 to 3.11 (GH-31009)

Author: jacobtylerwalls

README.rst

@@ -133,7 +133,7 @@ What's New
 ----------
 
 We have a comprehensive overview of the changes in the `What's New in Python
-3.10 <https://docs.python.org/3.10/whatsnew/3.10.html>`_ document.  For a more
+3.11 <https://docs.python.org/3.11/whatsnew/3.11.html>`_ document.  For a more
 detailed change log, read `Misc/NEWS
 <https://github.com/python/cpython/blob/main/Misc/NEWS.d>`_, but a full
 accounting of changes can only be gleaned from the `commit history
@@ -146,7 +146,7 @@ entitled "Installing multiple versions".
 Documentation
 -------------
 
-`Documentation for Python 3.10 <https://docs.python.org/3.10/>`_ is online,
+`Documentation for Python 3.11 <https://docs.python.org/3.11/>`_ is online,
 updated daily.
 
 It can also be downloaded in many formats for faster access.  The documentation
@@ -205,8 +205,8 @@ intend to install multiple versions using the same prefix you must decide which
 version (if any) is your "primary" version.  Install that version using ``make
 install``.  Install all other versions using ``make altinstall``.
 
-For example, if you want to install Python 2.7, 3.6, and 3.10 with 3.10 being the
-primary version, you would execute ``make install`` in your 3.10 build directory
+For example, if you want to install Python 2.7, 3.6, and 3.11 with 3.11 being the
+primary version, you would execute ``make install`` in your 3.11 build directory
 and ``make altinstall`` in the others.