In my review of [1] I tried to reformat the template code of the language
menue whereby I have made two mistakes.
- default language was added twice
- in the 'Auto-detect' item a hard coded `[auto]` was implemented where the
`search_language` variable was needed.
[1] https://github.com/searxng/searxng/issues/3645
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>