Bump node-fetch from 2.6.7 to 2.6.8

Bumps [node-fetch](https://github.com/node-fetch/node-fetch) from 2.6.7 to 2.6.8.
- [Release notes](https://github.com/node-fetch/node-fetch/releases)
- [Commits](node-fetch/node-fetch@v2.6.7...v2.6.8)

---
updated-dependencies:
- dependency-name: node-fetch
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -31,7 +31,7 @@
     "@actions/core": "^1.10.0",
     "@adobe/node-fetch-retry": "^2.2.0",
     "@octokit/rest": "^19.0.5",
-    "node-fetch": "^2.6.7",
+    "node-fetch": "^2.6.8",
     "unzipper": "^0.10.11"
   },
   "devDependencies": {