[fix] make test.shell - ./manage line 80

make test.shell reports an issue that has been added in [PR-500]::

    In ./manage line 80:
      yamllint  : lint YAML files: $YAMLLINT_FILES
                                   ^-------------^
                                   SC2128: Expanding an array without an
                                   index only gives the first element.

[PR-500] https://github.com/searxng/searxng/pull/500



Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>