Bump postcss from 8.2.5 to 8.2.6

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

yarn.lock

@@ -6156,9 +6156,9 @@ postcss@^7.0.16:
     supports-color "^6.1.0"
 
 postcss@^8.0.3:
-  version "8.2.5"
-  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.5.tgz#3c75149ada4e93db9521913654c0144517f77c9a"
-  integrity sha512-wMcb7BpDcm3gxQOQx46NDNT36Kk0Ao6PJLLI2ed5vehbbbxCEuslSQzbQ2sfSKy+gkYxhWcGWSeaK+gwm4KIZg==
+  version "8.2.6"
+  resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.2.6.tgz#5d69a974543b45f87e464bc4c3e392a97d6be9fe"
+  integrity sha512-xpB8qYxgPuly166AGlpRjUdEYtmOWx2iCwGmrv4vqZL9YPVviDVPZPRXxnXr6xPZOdxQ9lp3ZBFCRgWJ7LE3Sg==
   dependencies:
     colorette "^1.2.1"
     nanoid "^3.1.20"