chore(deps-dev): bump postcss from 8.2.7 to 8.2.8 (#7100)

Bumps [postcss](https://github.com/postcss/postcss) from 8.2.7 to 8.2.8.
- [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/8.2.7...8.2.8)
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Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -23772,9 +23772,9 @@
       "dev": true
     },
     "postcss": {
-      "version": "8.2.7",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.7.tgz",
-      "integrity": "sha512-DsVLH3xJzut+VT+rYr0mtvOtpTjSyqDwPf5EZWXcb0uAKfitGpTY9Ec+afi2+TgdN8rWS9Cs88UDYehKo/RvOw==",
+      "version": "8.2.8",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.2.8.tgz",
+      "integrity": "sha512-1F0Xb2T21xET7oQV9eKuctbM9S7BC0fetoHCc4H13z0PT6haiRLP4T0ZY4XWh7iLP0usgqykT6p9B2RtOf4FPw==",
       "dev": true,
       "requires": {
         "colorette": "^1.2.2",

package.json

@@ -156,7 +156,7 @@
     "npm-run-all": "^4.1.5",
     "oauth2-server": "^2.4.1",
     "open": "^8.0.2",
-    "postcss": "=8.2.7",
+    "postcss": "=8.2.8",
     "postcss-loader": "=4.2.0",
     "postcss-preset-env": "=6.7.0",
     "prettier": "^2.0.0",