Update flawfinder to version 2.0.19 / rev 7 via SR 915449
    
    https://build.opensuse.org/request/show/915449
    by user jubalh + dimstar_suse
    - Update to 2.0.19:
      * entrypoint.sh: Don't require output filename to be escaped
      * entrypoint.sh: Make minor improvements (#54)
      * print warning messages to stderr (#58)
      * changes to github actions