Move and add a comment.

Author: ZeroIntensity

Doc/requirements.txt

@@ -7,9 +7,12 @@
 # won't suddenly cause build failures. Updating the version is fine as long
 # as no warnings are raised by doing so.
 # Keep this version in sync with ``Doc/conf.py``.
-pygments @ git+https://github.com/pygments/pygments@2cad2642058441b59782a6a18f03c98c42d081f1
 sphinx<9.0.0
 
+# Temporary direct requirement, pending release of Pygments > 2.20.0
+# https://github.com/pygments/pygments/discussions/3145
+pygments @ git+https://github.com/pygments/pygments@2cad2642058441b59782a6a18f03c98c42d081f1
+
 blurb
 
 sphinxext-opengraph~=0.13.0