minor doc fix, '-a' is outdated, should be '--args'

[michaeldbrandt]

Pull Request Details

Description

Found this documentation issue during testing the 4.4 release candidate. The documentation is wrong, '-a' is not a valid option and will error. '-arg' is correct.

Related Issue

N/A

Which devices/areas does this affect?

N/A

Testing Done

N/A

Checklist

• [ X] I have read the CONTRIBUTING document.
• [ X My code follows the code style of this project. See CODING.md.
• [ X] I have updated the documentation accordingly.
• [ X] I have added tests to cover my changes, and all previous tests pass.
• [ X] I have checked all compat numbers if they need updating (FPGA compat, MPM compat, noc_shell, specific RFNoC block, ...)

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