chore(deps): update dependency @adobe/eslint-config-helix to v3.0.21

Author: renovate[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "./packages/*"
   ],
   "devDependencies": {
-    "@adobe/eslint-config-helix": "3.0.19",
+    "@adobe/eslint-config-helix": "3.0.21",
     "@babel/core": "7.28.5",
     "@babel/eslint-parser": "7.28.5",
     "@babel/plugin-syntax-import-assertions": "7.27.1",