Use with options that can take multiple arguments

[ltalirz]

Some lychee options can take multiple arguments, e.g. the --exclude options.
When using those options, one then needs to separate the list of files to check by a double dash --, see lycheeverse/lychee#113

For example:

lychee --verbose --timeout 40 --insecure  --exclude "https://www.msg.chem.iastate.edu/"  "https://openmopac.net/"  -- codes.md

The problem is: lychee-action appends --output /tmp/lychee/out.md to the command line, which is then interpreted as another input file:

lychee --verbose --timeout 40 --insecure --exclude https://www.msg.chem.iastate.edu/ https://openmopac.net/ -- codes.md --output /tmp/lychee/out.md
Error: Failed to read file: `--output`, reason: No such file or directory (os error 2)

Instead of appending the --output option, what about prepending it before the args?