[linter] fix check-doc
[linter] fix check-doc

Summary: I somehow did a rebase mistake before landing D11947, so this change was not included. This breaks the check-doc linter, which fails to recognize `GetIntArg` as a valid use of a documented parameter.

Test Plan: `arc lint`

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D11951

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