Fix installing answerers when installing SearXNG through a wheel [1]. These
files have been missed in commit d72fa99b.
Here is what have been tested:
$ make clean py.build
...
$ python -m venv test123
$ . ./test123/bin/activate
(test123) $ pip install dist/searxng-2024*-py3-none-any.whl
(test123) $ SEARXNG_DEBUG=1 searxng-run
[1] https://github.com/searxng/searxng/pull/3045#issuecomment-1961767861
