Update dependency @nomiclabs/hardhat-etherscan to v3.1.6

Author: renovate[bot]

package.json

@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "@nomiclabs/hardhat-ethers": "2.2.2",
-    "@nomiclabs/hardhat-etherscan": "3.1.5",
+    "@nomiclabs/hardhat-etherscan": "3.1.6",
     "@nomiclabs/hardhat-waffle": "2.0.3",
     "@playwright/test": "1.30.0",
     "@types/mocha": "10.0.1",

yarn.lock

@@ -1491,10 +1491,10 @@
   resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-ethers/-/hardhat-ethers-2.2.2.tgz#812d48929c3bf8fe840ec29eab4b613693467679"
   integrity sha512-NLDlDFL2us07C0jB/9wzvR0kuLivChJWCXTKcj3yqjZqMoYp7g7wwS157F70VHx/+9gHIBGzak5pKDwG8gEefA==
 
-"@nomiclabs/hardhat-etherscan@3.1.5":
-  version "3.1.5"
-  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-3.1.5.tgz#24f3f3272d3c79acdc933b557810ca85caef0fee"
-  integrity sha512-PxPX28AGBAlxgXLU27NB3oiMsklxbNhM75SDC4v1QPCyPeAxGm4xV0WpYbR10W7sxY2WF3Ek7u7GhjbQWa2Fcg==
+"@nomiclabs/hardhat-etherscan@3.1.6":
+  version "3.1.6"
+  resolved "https://registry.yarnpkg.com/@nomiclabs/hardhat-etherscan/-/hardhat-etherscan-3.1.6.tgz#7e50aeb06501a0060655664599d9e35cfd475929"
+  integrity sha512-5WFIZeLLgWPiCJqm/4ie7UNXn7FXfzYmqnKwOKU2MLETGolzY1cueSYUTww/P8f+Zc9xfJLmzqSYcGLW/3j/IQ==
   dependencies:
     "@ethersproject/abi" "^5.1.2"
     "@ethersproject/address" "^5.0.2"