chore(deps): update dependency @nomiclabs/hardhat-solhint to v4 (#32)

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This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
|
[@nomiclabs/hardhat-solhint](https://togithub.com/nomiclabs/hardhat/tree/main/packages/hardhat-solhint)
([source](https://togithub.com/nomiclabs/hardhat)) | devDependencies |
major | [`3.1.0` ->
`4.0.0`](https://renovatebot.com/diffs/npm/@nomiclabs%2fhardhat-solhint/3.1.0/4.0.0)
| [![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/nomiclabs/hardhat/badge)](https://securityscorecards.dev/viewer/?uri=github.com/nomiclabs/hardhat)
|

---

### Release Notes

<details>
<summary>nomiclabs/hardhat (@&#8203;nomiclabs/hardhat-solhint)</summary>

###
[`v4.0.0`](https://togithub.com/NomicFoundation/hardhat/releases/tag/%40nomiclabs/hardhat-solhint%404.0.0)

[Compare
Source](https://togithub.com/nomiclabs/hardhat/compare/@nomiclabs/[email protected]...@nomiclabs/[email protected])

This release is a major update. It fixes the issue of the check task
always exiting with exit code 0, even if solhint reports errors
([#&#8203;5057](https://togithub.com/nomiclabs/hardhat/issues/5057)). It
also updates the solhint dependency to
[v5.0.2](https://togithub.com/protofire/solhint/releases/tag/v5.0.2).

##### Changes

- [`cc79bd7`](https://togithub.com/nomiclabs/hardhat/commit/cc79bd7):
Ensured the check task exits with exit code 1 when solhint raises any
errors; this is a breaking change since the check task would previously
always exit with exit code 0
- [`9cae5e7`](https://togithub.com/nomiclabs/hardhat/commit/9cae5e7):
Updated solhint dependency to
[v5.0.2](https://togithub.com/protofire/solhint/releases/tag/v5.0.2)

***

> 💡 **The Nomic Foundation is hiring! Check [our open
positions](https://www.nomic.foundation/jobs).**

***

</details>

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package.json

@@ -15,7 +15,7 @@
     "@nomicfoundation/hardhat-foundry": "1.1.2",
     "@nomicfoundation/hardhat-ignition-viem": "0.15.5",
     "@nomicfoundation/hardhat-toolbox-viem": "3.0.0",
-    "@nomiclabs/hardhat-solhint": "3.1.0",
+    "@nomiclabs/hardhat-solhint": "4.0.0",
     "@openzeppelin/contracts": "5.0.2",
     "@openzeppelin/subgraphs": "0.1.8-5",
     "hardhat": "2.22.7",