fix(deps): update dependency webpack-merge to v6 (#30891)

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

package.json

@@ -127,7 +127,7 @@
     "webpack-assets-manifest": "^4.0.6",
     "webpack-bundle-analyzer": "^4.8.0",
     "webpack-cli": "^3.3.12",
-    "webpack-merge": "^5.9.0",
+    "webpack-merge": "^6.0.0",
     "wicg-inert": "^3.1.2",
     "workbox-expiration": "^7.0.0",
     "workbox-precaching": "^7.0.0",

yarn.lock

@@ -2901,7 +2901,7 @@ __metadata:
     webpack-bundle-analyzer: "npm:^4.8.0"
     webpack-cli: "npm:^3.3.12"
     webpack-dev-server: "npm:^3.11.3"
-    webpack-merge: "npm:^5.9.0"
+    webpack-merge: "npm:^6.0.0"
     wicg-inert: "npm:^3.1.2"
     workbox-expiration: "npm:^7.0.0"
     workbox-precaching: "npm:^7.0.0"
@@ -17928,14 +17928,14 @@ __metadata:
   languageName: node
   linkType: hard
 
-"webpack-merge@npm:^5.9.0":
-  version: 5.10.0
-  resolution: "webpack-merge@npm:5.10.0"
+"webpack-merge@npm:^6.0.0":
+  version: 6.0.1
+  resolution: "webpack-merge@npm:6.0.1"
   dependencies:
     clone-deep: "npm:^4.0.1"
     flat: "npm:^5.0.2"
-    wildcard: "npm:^2.0.0"
-  checksum: 10c0/b607c84cabaf74689f965420051a55a08722d897bdd6c29cb0b2263b451c090f962d41ecf8c9bf56b0ab3de56e65476ace0a8ecda4f4a4663684243d90e0512b
+    wildcard: "npm:^2.0.1"
+  checksum: 10c0/bf1429567858b353641801b8a2696ca0aac270fc8c55d4de8a7b586fe07d27fdcfc83099a98ab47e6162383db8dd63bb8cc25b1beb2ec82150422eec843b0dc0
   languageName: node
   linkType: hard
 
@@ -18183,7 +18183,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"wildcard@npm:^2.0.0":
+"wildcard@npm:^2.0.1":
   version: 2.0.1
   resolution: "wildcard@npm:2.0.1"
   checksum: 10c0/08f70cd97dd9a20aea280847a1fe8148e17cae7d231640e41eb26d2388697cbe65b67fd9e68715251c39b080c5ae4f76d71a9a69fa101d897273efdfb1b58bf7