Removing equals from --config (pico-args upstream update)

[wileyj]

2.4.0.1.0 had an upstream dependency update that requires a small change to running stacks-node with the --config arg:
previously: stacks-node --config=/path/to/Config.toml was valid.

with the update, the above no longer works and must be: stacks-node --config /path/to/Config.toml

note the missing =

[kenrogers]

Thanks jw, looks good