chore(deps): update dependency solhint to v5.2.0 (#187)

This PR contains the following updates:

| Package | Type | Update | Change | OpenSSF |
|---|---|---|---|---|
| [solhint](https://protofire.github.io/solhint/)
([source](https://redirect.github.com/protofire/solhint)) | dependencies
| minor | [`5.1.0` ->
`5.2.0`](https://renovatebot.com/diffs/npm/solhint/5.1.0/5.2.0) |
[![OpenSSF
Scorecard](https://api.securityscorecards.dev/projects/github.com/protofire/solhint/badge)](https://securityscorecards.dev/viewer/?uri=github.com/protofire/solhint)
|

---

### Release Notes

<details>
<summary>protofire/solhint (solhint)</summary>

###
[`v5.2.0`](https://redirect.github.com/protofire/solhint/blob/HEAD/CHANGELOG.md#520---2025-06-27)

[Compare
Source](https://redirect.github.com/protofire/solhint/compare/v5.1.0...2fc8b33bb13afa7979d21870de8c2d950c201a3e)

##### Fixed

- `imports-order` interference with `no-unused-imports`
[#&#8203;684](https://redirect.github.com/protofire/solhint/pull/684)

##### Added

- Added `cache` flag allowing to skip already evaluated files if no
error was thrown and file did not change -
[#&#8203;685](https://redirect.github.com/protofire/solhint/pull/685)
- Added multi-directory config support by hierarchy -
[#&#8203;678](https://redirect.github.com/protofire/solhint/pull/678)
- Added better error handling on invalid configs -
[#&#8203;683](https://redirect.github.com/protofire/solhint/pull/683)

Thanks to [@&#8203;smol-ninja](https://redirect.github.com/smol-ninja) -
[@&#8203;PaulRBerg](https://redirect.github.com/PaulRBerg)
[@&#8203;lechpzn](https://redirect.github.com/lechpzn),
[@&#8203;otc-png](https://redirect.github.com/otc-png),
[@&#8203;MamunC0der](https://redirect.github.com/MamunC0der),
[@&#8203;kks-code](https://redirect.github.com/kks-code),
[@&#8203;RidaMichofi](https://redirect.github.com/RidaMichofi)

For making the time of proposing rules, pointing out typos, broken
links, unused code, copyright, small reviews, etc. We really appreciate
your contributions!

<br><br>

</details>

---

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---

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## Summary by Sourcery

Upgrade Solhint to v5.2.0 to apply the latest enhancements, including
caching, multi-directory config, and better error handling, and to fix
import ordering interference.

New Features:
- Add cache flag to skip already evaluated files when no errors occur
- Support multi-directory configuration via hierarchical lookup
- Improve error handling for invalid configurations

Bug Fixes:
- Fix imports-order rule interfering with no-unused-imports

Build:
- Update solhint dependency from v5.1.0 to v5.2.0

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

bun.lock

@@ -44,7 +44,7 @@
     "@openzeppelin/contracts": "5.3.0",
     "@openzeppelin/subgraphs": "0.1.8-5",
     "hardhat": "2.25.0",
-    "solhint": "5.1.0"
+    "solhint": "5.2.0"
   },
   "overrides": {
     "@graphprotocol/graph-cli": "0.96.0",