chore(deps): update dependency postcss to ^8.5.6

Author: renovate[bot]

explorer/package.json

@@ -136,7 +136,7 @@
     "eslint-plugin-tailwindcss": "^3.18.2",
     "gh-pages": "^6.3.0",
     "jest-canvas-mock": "^2.5.2",
-    "postcss": "^8.5.3",
+    "postcss": "^8.5.6",
     "prettier": "^3.5.3",
     "prettier-plugin-tailwindcss": "^0.6.11",
     "prop-types": "^15.8.1",

explorer/yarn.lock

@@ -11691,7 +11691,7 @@ [email protected]:
     picocolors "^1.1.1"
     source-map-js "^1.2.1"
 
-postcss@^8.4.23:
+postcss@^8.4.23, postcss@^8.5.6:
   version "8.5.6"
   resolved "https://registry.yarnpkg.com/postcss/-/postcss-8.5.6.tgz#2825006615a619b4f62a9e7426cc120b349a8f3c"
   integrity sha512-3Ybi1tAuwAP9s0r1UQ2J4n5Y0G05bJkpUIO0/bI9MhwmD70S5aTWbXGBwxHrelT+XM1k6dM0pk+SwNkpTRN7Pg==