Update dependency postcss to v8.4.34 (#29103)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

yarn.lock

@@ -13144,13 +13144,13 @@ __metadata:
   linkType: hard
 
 "postcss@npm:^8.2.15, postcss@npm:^8.4.24, postcss@npm:^8.4.33":
-  version: 8.4.33
-  resolution: "postcss@npm:8.4.33"
+  version: 8.4.34
+  resolution: "postcss@npm:8.4.34"
   dependencies:
     nanoid: "npm:^3.3.7"
     picocolors: "npm:^1.0.0"
     source-map-js: "npm:^1.0.2"
-  checksum: 16eda83458fcd8a91bece287b5920c7f57164c3ea293e6c80d0ea71ce7843007bcd8592260a5160b9a7f02693e6ac93e2495b02d8c7596d3f3f72c1447e3ba79
+  checksum: 4d6f072cdfdc1ced16b4336263d830f8b4397fc47b9b382e02f6448fda9386d881aa9d27fbe0dd124f59c76f3a5da4f360919d25dfc818eca50b48f042af35a8
   languageName: node
   linkType: hard