doc: Specify static file explicitly

doc/manual-src/en/conf.py.in

@@ -121,7 +121,7 @@ html_theme_options = {'bodyfont':'roboto, sans-serif',
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ['_static/default2.css']
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.

doc/manual-src/pt/conf.py.in

@@ -121,7 +121,7 @@ html_short_title = u'Documentação aria2 em Português'
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ['_static/default2.css']
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.

doc/manual-src/ru/conf.py.in

@@ -121,7 +121,7 @@ html_theme_options = {'bodyfont':'roboto, sans-serif',
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
-html_static_path = ['_static']
+html_static_path = ['_static/default2.css']
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.