doc: fix build with sphinx 5.0 and later.

Sphinx 5.0 and later fails to build when language is set to None:
Warning, treated as error:
Invalid configuration value found: 'language = None'. Update your configuration to a valid langauge code. Falling back to 'en' (English)

Let's set the language to English since it is the language used for the
documentation.

Cc: Quentin Schulz <foss+uboot@0leil.net>
Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Quentin Schulz 2022-11-07 14:49:31 +01:00 committed by Heinrich Schuchardt
parent 030c2d187e
commit 2b94359e9c

View File

@ -178,7 +178,7 @@ finally:
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
language = None
language = 'en'
# There are two options for replacing |today|: either, you set today to some
# non-false value, then it is used: