[GIT PULL] Documentation fixes for 6.2

[Jonathan Corbet]

The following changes since commit 1b929c02afd37871d5afb9d498426f83432e71c2:

  Linux 6.2-rc1 (2022-12-25 13:41:39 -0800)

are available in the Git repository at:

  git://git.lwn.net/linux.git tags/docs-6.2-fixes

for you to fetch changes up to a33ae832bf3f2ac33e2e44b99f76130d3be848c5:

  docs/conf.py: Use about.html only in sidebar of alabaster theme (2023-01-11 15:06:50 -0700)

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Three documentation fixes (or rather two and one warning):

 - Sphinx 6.0 broke our configuration mechanism, so fix it.
 - I broke our configuration for non-Alabaster themes; Akira fixed it.
 - Deprecate Sphinx < 2.4 with an eye toward future removal

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Akira Yokosawa (1):
      docs/conf.py: Use about.html only in sidebar of alabaster theme

Jonathan Corbet (2):
      docs: Fix the docs build with Sphinx 6.0
      docs: Deprecate use of Sphinx < 2.4.x

 Documentation/conf.py               | 12 +++++++++++-
 Documentation/sphinx/load_config.py |  6 ++++--
 2 files changed, 15 insertions(+), 3 deletions(-)