chore(deps): bump solmate from 6.2.0 to 6.8.0 in /contracts/avs

Bumps [solmate](https://github.com/transmissions11/solmate) from 6.2.0 to 6.8.0.
- [Release notes](https://github.com/transmissions11/solmate/releases)
- [Commits](https://github.com/transmissions11/solmate/commits)

---
updated-dependencies:
- dependency-name: solmate
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

contracts/avs/package.json

@@ -21,6 +21,6 @@
     "@openzeppelin/contracts-upgradeable": "4.9.6",
     "eigenlayer-contracts": "github:Layr-Labs/eigenlayer-contracts",
     "eigenlayer-middleware": "github:Layr-Labs/eigenlayer-middleware",
-    "solmate": "^6.2.0"
+    "solmate": "^6.8.0"
   }
 }