ci: 📦 update dependency postcss to v8.4.39 (#465)

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

yarn.lock

@@ -18450,7 +18450,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss@npm:8.4.38, postcss@npm:^8.2.14, postcss@npm:^8.4.14, postcss@npm:^8.4.23, postcss@npm:^8.4.24, postcss@npm:^8.4.31, postcss@npm:^8.4.33, postcss@npm:^8.4.38, postcss@npm:^8.4.5":
+"postcss@npm:8.4.38":
   version: 8.4.38
   resolution: "postcss@npm:8.4.38"
   dependencies:
@@ -18461,6 +18461,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"postcss@npm:^8.2.14, postcss@npm:^8.4.14, postcss@npm:^8.4.23, postcss@npm:^8.4.24, postcss@npm:^8.4.31, postcss@npm:^8.4.33, postcss@npm:^8.4.38, postcss@npm:^8.4.5":
+  version: 8.4.39
+  resolution: "postcss@npm:8.4.39"
+  dependencies:
+    nanoid: ^3.3.7
+    picocolors: ^1.0.1
+    source-map-js: ^1.2.0
+  checksum: 14b130c90f165961772bdaf99c67f907f3d16494adf0868e57ef68baa67e0d1f6762db9d41ab0f4d09bab6fb7888588dba3596afd1a235fd5c2d43fba7006ac6
+  languageName: node
+  linkType: hard
+
 "prelude-ls@npm:^1.2.1":
   version: 1.2.1
   resolution: "prelude-ls@npm:1.2.1"