Update dependency postcss-loader to v8.1.0 (#8932)

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

war/package.json

@@ -35,7 +35,7 @@
     "handlebars-loader": "1.7.3",
     "mini-css-extract-plugin": "2.7.7",
     "postcss": "8.4.33",
-    "postcss-loader": "8.0.0",
+    "postcss-loader": "8.1.0",
     "postcss-preset-env": "9.3.0",
     "postcss-scss": "4.0.9",
     "prettier": "3.2.4",

war/yarn.lock

@@ -4336,7 +4336,7 @@ __metadata:
     lodash: "npm:4.17.21"
     mini-css-extract-plugin: "npm:2.7.7"
     postcss: "npm:8.4.33"
-    postcss-loader: "npm:8.0.0"
+    postcss-loader: "npm:8.1.0"
     postcss-preset-env: "npm:9.3.0"
     postcss-scss: "npm:4.0.9"
     prettier: "npm:3.2.4"
@@ -5505,17 +5505,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-loader@npm:8.0.0":
-  version: 8.0.0
-  resolution: "postcss-loader@npm:8.0.0"
+"postcss-loader@npm:8.1.0":
+  version: 8.1.0
+  resolution: "postcss-loader@npm:8.1.0"
   dependencies:
     cosmiconfig: "npm:^9.0.0"
     jiti: "npm:^1.20.0"
     semver: "npm:^7.5.4"
   peerDependencies:
+    "@rspack/core": 0.x || 1.x
     postcss: ^7.0.0 || ^8.0.1
     webpack: ^5.0.0
-  checksum: a31eedd2cac3a46b60527a2aee2369010f65dfc1dafb6ee00badfe6b662cefe00269b03adaa04be1524c566ea5b00f8716c150e79fe9b5c4fc8bb39a4e372be1
+  peerDependenciesMeta:
+    "@rspack/core":
+      optional: true
+    webpack:
+      optional: true
+  checksum: 75f46f2728469a5dc410c21fdcabbf98236329a7763243ad0087d971fb9ee5a771e2f5c958b131698e22381b147927e2b4bee1a81c010ae137a147b45909adc7
   languageName: node
   linkType: hard