chore(deps): update dependency sinon to v20 (#1953)

Co-authored-by: d-goog <188102366+d-goog@users.noreply.github.com>

Author: renovate-bot

.github/scripts/package.json

@@ -16,6 +16,6 @@
     "devDependencies": {
         "@octokit/rest": "^21.0.0",
         "mocha": "^10.0.0",
-        "sinon": "^18.0.0"
+        "sinon": "^20.0.0"
     }
 }

package.json

@@ -56,7 +56,7 @@
     "nock": "^14.0.1",
     "null-loader": "^4.0.0",
     "puppeteer": "^24.0.0",
-    "sinon": "^18.0.1",
+    "sinon": "^20.0.0",
     "ts-loader": "^8.0.0",
     "typescript": "^5.1.6",
     "webpack": "^5.21.2",