Alias args to call and make call optional

[kpenfound]

Discussed in person. We'd like to:

• Make args optional, so if I don't pass args (or call) we can just use the action to install dagger and run dagger call foo in bash steps manually
• alias call to args so that we can say call: hello instead of args: hello

[jedevc]

This test case is in the version job - just for clarity, either it should be in a different job, or we could rename this job to something else?

[kpenfound]

Yeah I can rename it. I didn't realize the workflow was called version, I just saw test.yml

[jpadams]

LGTM. Agree to add new job