Update dependency postcss-loader to v8

Author: renovate[bot]

Diff for: web/package.json

@@ -24,7 +24,7 @@
   "devDependencies": {
     "autoprefixer": "10.4.4",
     "postcss": "8.4.12",
-    "postcss-loader": "6.2.1",
+    "postcss-loader": "8.1.0",
     "tailwindcss": "3.0.23"
   }
 }

Diff for: yarn.lock

@@ -9622,6 +9622,23 @@ __metadata:
   languageName: node
   linkType: hard
 
+"cosmiconfig@npm:^9.0.0":
+  version: 9.0.0
+  resolution: "cosmiconfig@npm:9.0.0"
+  dependencies:
+    env-paths: ^2.2.1
+    import-fresh: ^3.3.0
+    js-yaml: ^4.1.0
+    parse-json: ^5.2.0
+  peerDependencies:
+    typescript: ">=4.9.5"
+  peerDependenciesMeta:
+    typescript:
+      optional: true
+  checksum: 1c1703be4f02a250b1d6ca3267e408ce16abfe8364193891afc94c2d5c060b69611fdc8d97af74b7e6d5d1aac0ab2fb94d6b079573146bc2d756c2484ce5f0ee
+  languageName: node
+  linkType: hard
+
 "cp-file@npm:^7.0.0":
   version: 7.0.0
   resolution: "cp-file@npm:7.0.0"
@@ -11005,7 +11022,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"env-paths@npm:2.2.1, env-paths@npm:^2.2.0":
+"env-paths@npm:2.2.1, env-paths@npm:^2.2.0, env-paths@npm:^2.2.1":
   version: 2.2.1
   resolution: "env-paths@npm:2.2.1"
   checksum: 285325677bf00e30845e330eec32894f5105529db97496ee3f598478e50f008c5352a41a30e5e72ec9de8a542b5a570b85699cd63bd2bc646dbcb9f311d83bc4
@@ -14225,7 +14242,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"import-fresh@npm:^3.0.0, import-fresh@npm:^3.1.0, import-fresh@npm:^3.2.1":
+"import-fresh@npm:^3.0.0, import-fresh@npm:^3.1.0, import-fresh@npm:^3.2.1, import-fresh@npm:^3.3.0":
   version: 3.3.0
   resolution: "import-fresh@npm:3.3.0"
   dependencies:
@@ -15772,6 +15789,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"jiti@npm:^1.20.0":
+  version: 1.21.0
+  resolution: "jiti@npm:1.21.0"
+  bin:
+    jiti: bin/jiti.js
+  checksum: 7f361219fe6c7a5e440d5f1dba4ab763a5538d2df8708cdc22561cf25ea3e44b837687931fca7cdd8cdd9f567300e90be989dd1321650045012d8f9ed6aab07f
+  languageName: node
+  linkType: hard
+
 "jose@npm:^2.0.5":
   version: 2.0.5
   resolution: "jose@npm:2.0.5"
@@ -16155,7 +16181,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"klona@npm:^2.0.4, klona@npm:^2.0.5":
+"klona@npm:^2.0.4":
   version: 2.0.5
   resolution: "klona@npm:2.0.5"
   checksum: 5b752c11ca8e2996612386699f52cc5aed802aa4116663d26239ac0b054fae25191dacb95587ecf1a167b039daa9fc3fa2da17dfd5d0821f3037de3821d9a9e5
@@ -18957,17 +18983,23 @@ __metadata:
   languageName: node
   linkType: hard
 
-"postcss-loader@npm:6.2.1":
-  version: 6.2.1
-  resolution: "postcss-loader@npm:6.2.1"
+"postcss-loader@npm:8.1.0":
+  version: 8.1.0
+  resolution: "postcss-loader@npm:8.1.0"
   dependencies:
-    cosmiconfig: ^7.0.0
-    klona: ^2.0.5
-    semver: ^7.3.5
+    cosmiconfig: ^9.0.0
+    jiti: ^1.20.0
+    semver: ^7.5.4
   peerDependencies:
+    "@rspack/core": 0.x || 1.x
     postcss: ^7.0.0 || ^8.0.1
     webpack: ^5.0.0
-  checksum: 736a1bf43a3e09e2351b5cc97cc26790a1c3261412c9dee063f3f6f2969a6ff7d8d194d9adcad01cee1afd1de071482318d9699e6157b67d46b3dccf3be1b58b
+  peerDependenciesMeta:
+    "@rspack/core":
+      optional: true
+    webpack:
+      optional: true
+  checksum: 75f46f2728469a5dc410c21fdcabbf98236329a7763243ad0087d971fb9ee5a771e2f5c958b131698e22381b147927e2b4bee1a81c010ae137a147b45909adc7
   languageName: node
   linkType: hard
 
@@ -21158,6 +21190,17 @@ __metadata:
   languageName: node
   linkType: hard
 
+"semver@npm:^7.5.4":
+  version: 7.5.4
+  resolution: "semver@npm:7.5.4"
+  dependencies:
+    lru-cache: ^6.0.0
+  bin:
+    semver: bin/semver.js
+  checksum: 5160b06975a38b11c1ab55950cb5b8a23db78df88275d3d8a42ccf1f29e55112ac995b3a26a522c36e3b5f76b0445f1eef70d696b8c7862a2b4303d7b0e7609e
+  languageName: node
+  linkType: hard
+
 "send@npm:0.17.2, send@npm:^0.17.1":
   version: 0.17.2
   resolution: "send@npm:0.17.2"
@@ -23844,7 +23887,7 @@ __metadata:
     "@redwoodjs/web": 1.2.0
     autoprefixer: 10.4.4
     postcss: 8.4.12
-    postcss-loader: 6.2.1
+    postcss-loader: 8.1.0
     prop-types: 15.8.1
     react: 17.0.2
     react-dom: 17.0.2