Backport: gh-128874: Fix the documentation for blurb 2.0

Summary:
this is a backport of [gh-128878](python/cpython#128878), fixing upstream issue python/cpython#128874 ("Building the documentation fails with newly released blurb 2.0")

this is needed for a successful build of the Windows installer, which automatically uses blurb 2+

Reviewed By: yilei

Differential Revision: D68649810

fbshipit-source-id: 88f2b64c65a9bc641468a35dda1005fea813fa11

Author: itamaro

Misc/NEWS.d/3.10.0b1.rst

@@ -941,7 +941,7 @@ result from ``entry_points()`` as deprecated.
 
 ..
 
-.. gh: 47383
+.. gh-issue: 47383
 .. date: 2021-04-08-19-32-26
 .. nonce: YI1hdL
 .. section: Library

Misc/NEWS.d/3.11.0b1.rst

@@ -570,7 +570,7 @@ planned). Patch by Alex Waygood.
 
 ..
 
-.. gh: 78157
+.. gh-issue: 78157
 .. date: 2022-05-05-20-40-45
 .. nonce: IA_9na
 .. section: Library
@@ -1289,7 +1289,7 @@ Deprecate the chunk module.
 
 ..
 
-.. gh: 91498
+.. gh-issue: 91498
 .. date: 2022-04-10-08-39-44
 .. nonce: 8oII92
 .. section: Library