Update the SOURCE_URI in pyspecific.py to point to the new branch

diff --git a/Doc/tools/extensions/pyspecific.py b/Doc/tools/extensions/pyspecific.py
index 12b98f4..b02e31d 100644
--- a/Doc/tools/extensions/pyspecific.py
+++ b/Doc/tools/extensions/pyspecific.py

@@ -45,7 +45,7 @@
 
 ISSUE_URI = 'https://bugs.python.org/issue?@action=redirect&bpo=%s'
 GH_ISSUE_URI = 'https://github.com/python/cpython/issues/%s'
-SOURCE_URI = 'https://github.com/python/cpython/tree/main/%s'
+SOURCE_URI = 'https://github.com/python/cpython/tree/3.11/%s'
 
 # monkey-patch reST parser to disable alphabetic and roman enumerated lists
 from docutils.parsers.rst.states import Body

diff --git a/Include/patchlevel.h b/Include/patchlevel.h
index 5a6f5ff..9747ca4 100644
--- a/Include/patchlevel.h
+++ b/Include/patchlevel.h

@@ -19,11 +19,11 @@
 #define PY_MAJOR_VERSION        3
 #define PY_MINOR_VERSION        11
 #define PY_MICRO_VERSION        0
-#define PY_RELEASE_LEVEL        PY_RELEASE_LEVEL_ALPHA
-#define PY_RELEASE_SERIAL       7
+#define PY_RELEASE_LEVEL        PY_RELEASE_LEVEL_BETA
+#define PY_RELEASE_SERIAL       1
 
 /* Version as a string */
-#define PY_VERSION              "3.11.0a7+"
+#define PY_VERSION              "3.11.0b1"
 /*--end constants--*/
 
 /* Version as a single 4-byte hex number, e.g. 0x010502B2 == 1.5.2b2.

diff --git a/README.rst b/README.rst
index 7a46de6..5a2b1ad 100644
--- a/README.rst
+++ b/README.rst

@@ -1,5 +1,5 @@
-This is Python version 3.11.0 alpha 7
-=====================================
+This is Python version 3.11.0 beta 1
+====================================
 
 .. image:: https://github.com/python/cpython/workflows/Tests/badge.svg
    :alt: CPython build status on GitHub Actions