Update dependency @angular-eslint/eslint-plugin to v20.6.0 (#5906)

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

Author: renovate[bot]

package-lock.json

@@ -98,7 +98,7 @@
     "type-fest": "5.2.0"
   },
   "dependencies": {
-    "@angular-eslint/eslint-plugin": "20.5.2",
+    "@angular-eslint/eslint-plugin": "20.6.0",
     "@babel/core": "7.28.5",
     "@babel/eslint-parser": "7.28.5",
     "@babel/plugin-proposal-decorators": "7.28.0",