chore(deps): update dependency @openzeppelin/contracts to v5.6.1

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

Author: renovate[bot]

bun.lock

@@ -41,7 +41,7 @@
     "@nomicfoundation/hardhat-ignition-viem": "0.15.16",
     "@nomicfoundation/hardhat-toolbox-viem": "4.1.1",
     "@nomiclabs/hardhat-solhint": "4.1.0",
-    "@openzeppelin/contracts": "5.4.0",
+    "@openzeppelin/contracts": "5.6.1",
     "@openzeppelin/subgraphs": "0.1.8-5",
     "hardhat": "2.27.1",
     "solhint": "6.0.1"