Bump @octokit/core from 3.2.5 to 3.3.1

Bumps [@octokit/core](https://github.com/octokit/core.js) from 3.2.5 to 3.3.1.
- [Release notes](https://github.com/octokit/core.js/releases)
- [Commits](octokit/core.js@v3.2.5...v3.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -16,7 +16,7 @@
     "url": "https://github.com/w3c/echidna/issues"
   },
   "dependencies": {
-    "@octokit/core": "3.2.5",
+    "@octokit/core": "3.3.1",
     "body-parser": "1.19.0",
     "compression": "1.7.4",
     "express": "4.17.1",