added permissions-nodes-contract-version flag

[adityajoshi12]

Added --permissions-nodes-contract-version flag while setting up the Onchain Permissioning/

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[bgravenorst]

Hi @adityajoshi12, thanks for your submission!

I've been working on a related documentation fix and incorporated your change into my PR. See #608.

Do you mind if I close this issue, and include your update in my PR?

[adityajoshi12]

Please go ahead.

[bgravenorst]

Implemented in #608.