docs: Fix language value in config.py

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

docs/conf.py

@@ -43,7 +43,7 @@ templates_path = ['_templates']
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = 'y'
+language = 'en'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.