Update dependency prettier to v2.8.8

Author: renovate[bot]

package.json

@@ -42,7 +42,7 @@
 		"hardhat": "2.9.9",
 		"husky": "7.0.4",
 		"mocha": "9.2.2",
-		"prettier": "2.8.7",
+		"prettier": "2.8.8",
 		"prettier-plugin-solidity": "1.1.3",
 		"solhint": "3.3.8",
 		"ts-node": "10.9.1",

yarn.lock

@@ -7486,10 +7486,10 @@ prettier-plugin-solidity@1.1.3:
     semver "^7.3.8"
     solidity-comments-extractor "^0.0.7"
 
-prettier@2.8.7:
-  version "2.8.7"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.7.tgz#bb79fc8729308549d28fe3a98fce73d2c0656450"
-  integrity sha512-yPngTo3aXUUmyuTjeTUT75txrf+aMh9FiD7q9ZE/i6r0bPb22g4FsE6Y338PQX1bmfy08i9QQCB7/rcUAVntfw==
+prettier@2.8.8:
+  version "2.8.8"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.8.8.tgz#e8c5d7e98a4305ffe3de2e1fc4aca1a71c28b1da"
+  integrity sha512-tdN8qQGvNjw4CHbY+XXk0JgCXn9QiF21a55rBe5LJAU+kDyC4WQn4+awm2Xfk2lQMk5fKup9XgzTZtGkjBdP9Q==
 
 prettier@^1.14.3:
   version "1.19.1"