Update dependency @types/node-fetch to v2.6.8 (#558)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [@types/node-fetch](https://togithub.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node-fetch) ([source](https://togithub.com/DefinitelyTyped/DefinitelyTyped)) | [`2.6.7` -> `2.6.8`](https://renovatebot.com/diffs/npm/@types%2fnode-fetch/2.6.7/2.6.8) | [![age](https://developer.mend.io/api/mc/badges/age/npm/@types%2fnode-fetch/2.6.8?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/@types%2fnode-fetch/2.6.8?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/@types%2fnode-fetch/2.6.7/2.6.8?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@types%2fnode-fetch/2.6.7/2.6.8?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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package.json

@@ -94,7 +94,7 @@
     "@types/http-proxy": "1.17.13",
     "@types/jest": "29.5.7",
     "@types/node": "20.8.9",
-    "@types/node-fetch": "2.6.7",
+    "@types/node-fetch": "2.6.8",
     "@types/react": "18.2.33",
     "@types/react-dom": "18.2.14",
     "@types/relay-runtime": "14.1.15",