Update GHA to use Node 16

Author: jakeboone02

.github/workflows/gh-pages.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '14.x'
+          node-version: '16.x'
       - name: Test Build
         run: |
           yarn install --frozen-lockfile
@@ -26,7 +26,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-node@v1
         with:
-          node-version: '14.x'
+          node-version: '16.x'
       - uses: webfactory/ssh-agent@v0.5.0
         with:
           ssh-private-key: ${{ secrets.GH_PAGES_DEPLOY }}