Make suggestions-cronjob.sh work again

Originally created by @hefee on #16109 (Redmine)

Traceback (most recent call last):
  File "/var/lib/weblate/scripts/save-suggestions.py", line 21, in <module>
    logging.config.fileConfig('saveSuggestions.conf')
  File "/usr/lib/python3.5/logging/config.py", line 76, in fileConfig
    formatters = _create_formatters(cp)
  File "/usr/lib/python3.5/logging/config.py", line 109, in _create_formatters
    flist = cp["formatters"]["keys"]
  File "/usr/lib/python3.5/configparser.py", line 956, in __getitem__
    raise KeyError(key)
KeyError: 'formatters'
rebuilding wiki..
scanning sandbox.mdwn

-> Issues:

• read logging config from current working directory
• runs build-website but save-sugestions.py failed
• hidden fails to run save-suggestions.py, as weblate was updated.

Feature Branch: https://salsa.debian.org/hefee/puppet-tails/tree/bugfix/16109-make-suggestions-cronjob.sh-work-again

Parent Task: tails/sysadmin#11759