[Tests] use a newer node version for this test to avoid flakiness

.github/workflows/toc.yml

@@ -20,7 +20,6 @@ jobs:
         allowed-endpoints:
           github.com:443
           registry.npmjs.org:443
-          api.github.com:443
     - uses: actions/checkout@v4
       with:
         # https://github.com/actions/checkout/issues/217#issue-599945005
@@ -31,7 +30,7 @@ jobs:
     - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
     - uses: actions/setup-node@v4
       with:
-        node-version: 'lts/*'
+        node-version: '16'
     - run: npm install
     - run: npm run doctoc
     - name: commit changes