Bump hardhat from 2.14.1 to 2.15.0 (#188)

Bumps [hardhat](https://github.com/nomiclabs/hardhat) from 2.14.1 to 2.15.0.
- [Release notes](https://github.com/nomiclabs/hardhat/releases)
- [Commits](https://github.com/nomiclabs/hardhat/compare/[email protected]@2.15.0)

---
updated-dependencies:
- dependency-name: hardhat
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "@types/node": ">=20.2.5",
     "chai": "^4.3.7",
     "ethers": "^5.7.2",
-    "hardhat": "^2.14.1",
+    "hardhat": "^2.15.0",
     "hardhat-gas-reporter": "^1.0.9",
     "prettier": "^2.8.8",
     "solidity-coverage": "^0.7.22",