groth16 comment update

[zjma]

Description

Add link to the snarkjs output converter.

How Has This Been Tested?

n/a

Key Areas to Review

n/a

Type of Change

• Documentation update

Which Components or Systems Does This Change Impact?

n/a

Checklist

• I have read and followed the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I identified and added all stakeholders and component owners affected by this change as reviewers
• I tested both happy and unhappy path of the functionality
• I have made corresponding changes to the documentation

[trunk-io]

⏱️ 17m total CI duration on this PR

Job	Cumulative Duration	Recent Runs
rust-move-tests	13m	🟩
rust-cargo-deny	2m	🟩
check-dynamic-deps	42s	🟩
semgrep/ci	29s	🟩
general-lints	26s	🟩
file_change_determinator	10s	🟩
permission-check	3s	🟩
permission-check	2s	🟩

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