Update dependency postcss to v8.5.15 (#11546)

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

Author: renovate[bot]

package.json

@@ -121,7 +121,7 @@
     "path-complete-extname": "1.0.0",
     "payment": "2.4.7",
     "porter-stemmer": "0.9.1",
-    "postcss": "8.5.14",
+    "postcss": "8.5.15",
     "postcss-import": "16.1.1",
     "prop-types": "15.8.1",
     "punycode": "2.3.1",

yarn.lock

@@ -18191,12 +18191,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nanoid@npm:^3.3.11":
-  version: 3.3.11
-  resolution: "nanoid@npm:3.3.11"
+"nanoid@npm:^3.3.12":
+  version: 3.3.12
+  resolution: "nanoid@npm:3.3.12"
   bin:
     nanoid: bin/nanoid.cjs
-  checksum: 10c0/40e7f70b3d15f725ca072dfc4f74e81fcf1fbb02e491cf58ac0c79093adc9b0a73b152bcde57df4b79cd097e13023d7504acb38404a4da7bc1cd8e887b82fe0b
+  checksum: 10c0/ba142b7b39e11e80c16dd74b0365d407880c87c1cf7e1480956981ae940ee36060fa5b6f092cd1e315184dd19244c657bd017d03327bd3c62247d691c5e8edfb
   languageName: node
   linkType: hard
 
@@ -20434,14 +20434,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.5.14, postcss@npm:^8.4.21, postcss@npm:^8.4.24, postcss@npm:^8.4.27, postcss@npm:^8.4.33, postcss@npm:^8.5.14, postcss@npm:^8.5.4":
-  version: 8.5.14
-  resolution: "postcss@npm:8.5.14"
+"postcss@npm:8.5.15, postcss@npm:^8.4.21, postcss@npm:^8.4.24, postcss@npm:^8.4.27, postcss@npm:^8.4.33, postcss@npm:^8.5.14, postcss@npm:^8.5.4":
+  version: 8.5.15
+  resolution: "postcss@npm:8.5.15"
   dependencies:
-    nanoid: "npm:^3.3.11"
+    nanoid: "npm:^3.3.12"
     picocolors: "npm:^1.1.1"
     source-map-js: "npm:^1.2.1"
-  checksum: 10c0/48138207cf5ef5581be1bfe2cb65ccfe0ac75e43888ba045afc8ed6043d7b56aeb3b9a9fe5b353ff554be943cd0cc15d826ccb991525159175971e5ee8ab0237
+  checksum: 10c0/7f2e63ae22fbe43aace1bf652bd99da4e90737c64194d49e51ddc9cd0f9e51ff2861a7d734379b494deffa03a880a5c65eec70bc29ee9ebaa7136dde3eee8f31
   languageName: node
   linkType: hard
 
@@ -22174,7 +22174,7 @@ __metadata:
     path-complete-extname: "npm:1.0.0"
     payment: "npm:2.4.7"
     porter-stemmer: "npm:0.9.1"
-    postcss: "npm:8.5.14"
+    postcss: "npm:8.5.15"
     postcss-import: "npm:16.1.1"
     prettier: "npm:3.8.3"
     prop-types: "npm:15.8.1"