Bump postcss from 8.2.5 to 8.2.6 (#3417)

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.5 to 8.2.6.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.2.5...8.2.6)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -9617,9 +9617,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.2.5",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.5.tgz",
-      "integrity": "sha512-wMcb7BpDcm3gxQOQx46NDNT36Kk0Ao6PJLLI2ed5vehbbbxCEuslSQzbQ2sfSKy+gkYxhWcGWSeaK+gwm4KIZg==",
+      "version": "8.2.6",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.6.tgz",
+      "integrity": "sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.1",

package.json

@@ -150,7 +150,7 @@
     "node-sass-package-importer": "^5.3.2",
     "nodemon": "^2.0.7",
     "npm-run-all": "^4.1.5",
-    "postcss": "^8.2.5",
+    "postcss": "^8.2.6",
     "postcss-cli": "^8.3.1",
     "postcss-scrollbar": "^0.3.0",
     "rollup": "^2.39.0",