Update broken links

[vipocenka]

This pull request addresses the following changes:

1. Fixed a typo in pairing.go by updating the link reference for the algorithm from https://eprint.iacr.org/2021/1359.qdf to https://eprint.iacr.org/2021/1359.pdf.
2. Updated the broken link in pedersen_hash_test.go from https://docs.starknet.io/documentation/develop/Contracts/contract-address/ to https://docs.starknet.io/docs/Contracts/contract-address.

These changes ensure better readability and usability of the references in the code.

Fixes: None directly linked but improves code documentation and references.

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Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

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How Has This Been Tested?

• Verified that the updated links are accessible and valid.

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Checklist:

• Performed a self-review of the changes.
• Updated code comments to reflect the changes.
• Verified tests to ensure existing functionalities remain intact.
• Ensured compatibility with related modules.

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Allow edits by maintainers

[ivokub]

Thanks! Very good catch!