Bump postcss from 8.3.10 to 8.3.11 in /build/javascript (#1490)

Bumps [postcss](https://github.com/postcss/postcss) from 8.3.10 to 8.3.11.
- [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/8.3.10...8.3.11)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

build/javascript/package-lock.json

@@ -1245,9 +1245,9 @@
       }
     },
     "postcss": {
-      "version": "8.3.10",
-      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.10.tgz",
-      "integrity": "sha512-YYfvfUdWx+ECpr5Hgc6XRfsaux8LksL5ey8qTtWiuRXOpOF1YYMwAySdh0nSmwhZAFvvJ6rgiIkKVShu4x2T1Q==",
+      "version": "8.3.11",
+      "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.3.11.tgz",
+      "integrity": "sha512-hCmlUAIlUiav8Xdqw3Io4LcpA1DOt7h3LSTAC4G6JGHFFaWzI6qvFt9oilvl8BmkbBRX1IhM90ZAmpk68zccQA==",
       "dev": true,
       "requires": {
         "nanoid": "^3.1.30",

build/javascript/package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "cssnano": "^5.0.8",
-    "postcss": "^8.3.10",
+    "postcss": "^8.3.11",
     "postcss-cli": "^9.0.1"
   },
   "snowpack": {