chore(deps): update dependency postcss to ^8.2.9 (#29379)

Co-authored-by: Renovate Bot <[email protected]>

packages/gatsby-plugin-image/package.json

@@ -59,7 +59,7 @@
     "do-sync": "^2.2.0",
     "microbundle": "^0.13.0",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.2.4",
+    "postcss": "^8.2.9",
     "terser": "^5.3.8",
     "typescript": "^4.1.5"
   },

yarn.lock

@@ -17841,10 +17841,10 @@ nanoclone@^0.2.1:
   resolved "https://registry.yarnpkg.com/nanoclone/-/nanoclone-0.2.1.tgz#dd4090f8f1a110d26bb32c49ed2f5b9235209ed4"
   integrity sha512-wynEP02LmIbLpcYw8uBKpcfF6dmg2vcpKqxeH5UcoKEYdExslsdUA4ugFauuaeYdTB76ez6gJW8XAZ6CgkXYxA==
 
-nanoid@^3.1.20:
-  version "3.1.20"
-  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.20.tgz#badc263c6b1dcf14b71efaa85f6ab4c1d6cfc788"
-  integrity sha512-a1cQNyczgKbLX9jwbS/+d7W8fX/RfgYR7lVWwWOGIPNgK2m0MWvrGF6/m4kk6U3QcFMnZf3RIhL0v2Jgh/0Uxw==
+nanoid@^3.1.20, nanoid@^3.1.22:
+  version "3.1.22"
+  resolved "https://registry.yarnpkg.com/nanoid/-/nanoid-3.1.22.tgz#b35f8fb7d151990a8aebd5aa5015c03cf726f844"
+  integrity sha512-/2ZUaJX2ANuLtTvqTlgqBQNJoQO398KyJgZloL0PZkC0dpysjncRUPsFe3DUPzz/y3h+u7C46np8RMuvF3jsSQ==
 
 nanomatch@^1.2.9:
   version "1.2.13"
@@ -20093,7 +20093,7 @@ [email protected]:
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
-[email protected], postcss@^8.1.4, postcss@^8.1.6, postcss@^8.2.1, postcss@^8.2.2, postcss@^8.2.4:
+[email protected]:
   version "8.2.6"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.6.tgz#5d69a974543b45f87e464bc4c3e392a97d6be9fe"
   integrity sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==
@@ -20128,6 +20128,15 @@ postcss@^7.0.0, postcss@^7.0.1, postcss@^7.0.14, postcss@^7.0.27, postcss@^7.0.3
     source-map "^0.6.1"
     supports-color "^6.1.0"
 
+postcss@^8.1.4, postcss@^8.1.6, postcss@^8.2.1, postcss@^8.2.2, postcss@^8.2.9:
+  version "8.2.9"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.9.tgz#fd95ff37b5cee55c409b3fdd237296ab4096fba3"
+  integrity sha512-b+TmuIL4jGtCHtoLi+G/PisuIl9avxs8IZMSmlABRwNz5RLUUACrC+ws81dcomz1nRezm5YPdXiMEzBEKgYn+Q==
+  dependencies:
+    colorette "^1.2.2"
+    nanoid "^3.1.22"
+    source-map "^0.6.1"
+
 potrace@^2.1.8:
   version "2.1.8"
   resolved "https://registry.yarnpkg.com/potrace/-/potrace-2.1.8.tgz#50f6fba92e1e39ddef6f979b0a0f841809e0acf2"