Bump postcss from 8.2.7 to 8.2.8

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)
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -6223,9 +6223,9 @@ postcss@^7.0.16:
     supports-color "^6.1.0"
 
 postcss@^8.0.3:
-  version "8.2.7"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.7.tgz#48ed8d88b4de10afa0dfd1c3f840aa57b55c4d47"
-  integrity sha512-DsVLH3xJzut+VT+rYr0mtvOtpTjSyqDwPf5EZWXcb0uAKfitGpTY9Ec+afi2+TgdN8rWS9Cs88UDYehKo/RvOw==
+  version "8.2.8"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.8.tgz#0b90f9382efda424c4f0f69a2ead6f6830d08ece"
+  integrity sha512-1F0Xb2T21xET7oQV9eKuctbM9S7BC0fetoHCc4H13z0PT6haiRLP4T0ZY4XWh7iLP0usgqykT6p9B2RtOf4FPw==
   dependencies:
     colorette "^1.2.2"
     nanoid "^3.1.20"