chore(@ngtools/webpack): minor fix to dependency to support ^5

Author: valorkin

packages/ngtools/webpack/package.json

@@ -28,7 +28,7 @@
   "peerDependencies": {
     "@angular/compiler-cli": "^11.0.0 || ^11.0.0-next",
     "typescript": ">=3.9 < 4.1",
-    "webpack": "^4.0.0"
+    "webpack": "^4.0.0 || ^5.0.0"
   },
   "devDependencies": {
     "@angular/compiler": "11.0.0-next.2",