Bump postcss from 8.4.29 to 8.4.31 in /web (#3336)

Bumps [postcss](https://github.com/postcss/postcss) from 8.4.29 to 8.4.31.
- [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/8.4.29...8.4.31)

---
updated-dependencies:
- dependency-name: postcss
  dependency-type: direct:development
...

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

web/package-lock.json

@@ -107,7 +107,7 @@
 				"mdx-mermaid": "^2.0.0",
 				"mermaid": "^10.0.0",
 				"npm": "^9.4.0",
-				"postcss": "^8.4.24",
+				"postcss": "^8.4.31",
 				"prettier": "3.0.3",
 				"sass": "1.67.0",
 				"sass-loader": "13.3.2",
@@ -37547,9 +37547,9 @@
 			}
 		},
 		"node_modules/postcss": {
-			"version": "8.4.29",
-			"resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.29.tgz",
-			"integrity": "sha512-cbI+jaqIeu/VGqXEarWkRCCffhjgXc0qjBtXpqJhTBohMUjUQnbBr0xqX3vEKudc4iviTewcJo5ajcec5+wdJw==",
+			"version": "8.4.31",
+			"resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
+			"integrity": "sha512-PS08Iboia9mts/2ygV3eLpY5ghnUcfLV/EXTOW1E2qYxJKGGBUtNjN76FYHnMs36RmARn41bC0AZmn+rR0OVpQ==",
 			"funding": [
 				{
 					"type": "opencollective",

web/package.json

@@ -113,7 +113,7 @@
 		"mdx-mermaid": "^2.0.0",
 		"mermaid": "^10.0.0",
 		"npm": "^9.4.0",
-		"postcss": "^8.4.24",
+		"postcss": "^8.4.31",
 		"prettier": "3.0.3",
 		"sass": "1.67.0",
 		"sass-loader": "13.3.2",