Bump @types/node from 20.8.3 to 20.8.6 in /src/autorest.bicep (#773)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 20.8.3 to 20.8.6.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/autorest.bicep/package.json

@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "@types/jest": "^27.4.1",
-    "@types/node": "^20.8.3",
+    "@types/node": "^20.8.6",
     "@typescript-eslint/eslint-plugin": "^6.7.4",
     "@typescript-eslint/parser": "^6.7.4",
     "colors": "^1.4.0",