chore: revert css-loader bump

Signed-off-by: blam <ben@blam.sh>

.changeset/honest-buttons-clean.md

@@ -0,0 +1,5 @@
+---
+'@backstage/cli': patch
+---
+
+Revert `css-loader@v7` bump

packages/cli/package.json

@@ -88,7 +88,7 @@
     "commander": "^12.0.0",
     "cross-fetch": "^4.0.0",
     "cross-spawn": "^7.0.3",
-    "css-loader": "^7.0.0",
+    "css-loader": "^6.5.1",
     "ctrlc-windows": "^2.1.0",
     "esbuild": "^0.24.0",
     "esbuild-loader": "^4.0.0",

yarn.lock

@@ -4027,7 +4027,7 @@ __metadata:
     commander: ^12.0.0
     cross-fetch: ^4.0.0
     cross-spawn: ^7.0.3
-    css-loader: ^7.0.0
+    css-loader: ^6.5.1
     ctrlc-windows: ^2.1.0
     del: ^8.0.0
     esbuild: ^0.24.0
@@ -26339,7 +26339,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"css-loader@npm:^6.7.1":
+"css-loader@npm:^6.5.1, css-loader@npm:^6.7.1":
   version: 6.11.0
   resolution: "css-loader@npm:6.11.0"
   dependencies:
@@ -26363,30 +26363,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"css-loader@npm:^7.0.0":
-  version: 7.1.2
-  resolution: "css-loader@npm:7.1.2"
-  dependencies:
-    icss-utils: ^5.1.0
-    postcss: ^8.4.33
-    postcss-modules-extract-imports: ^3.1.0
-    postcss-modules-local-by-default: ^4.0.5
-    postcss-modules-scope: ^3.2.0
-    postcss-modules-values: ^4.0.0
-    postcss-value-parser: ^4.2.0
-    semver: ^7.5.4
-  peerDependencies:
-    "@rspack/core": 0.x || 1.x
-    webpack: ^5.27.0
-  peerDependenciesMeta:
-    "@rspack/core":
-      optional: true
-    webpack:
-      optional: true
-  checksum: 15bfd90d778ddab90ee1d04c8c8bcc13ea6c0791d01b52b09d1b1c753b3410f7a7788a510d93726a9878e70b7c1a140f21efdf5c96e1857872107551d3897822
-  languageName: node
-  linkType: hard
-
 "css-select@npm:^4.1.3, css-select@npm:^4.2.1":
   version: 4.3.0
   resolution: "css-select@npm:4.3.0"