chore(deps): update dependency @subsquid/substrate-typegen to v2

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@subsquid/substrate-typegen	1.5.1 -> 2.0.0

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Release Notes

subsquid/squid

### [`v2.0.0`](https://togithub.com/subsquid/squid/compare/9aa2cbcbd2dd97c7e44e55e8be7125eb9e2b5e65...8ac51190ff35ac389f32c0cf1b4adb9055a3dafa) [Compare Source](https://togithub.com/subsquid/squid/compare/9aa2cbcbd2dd97c7e44e55e8be7125eb9e2b5e65...8ac51190ff35ac389f32c0cf1b4adb9055a3dafa)

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Configuration

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🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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