Update actions/create-github-app-token digest to 21cfef2 (#47)

Co-authored-by: Michael Valdron's Renovate Bot <196462970+mvaldron-renovate[bot]@users.noreply.github.com>

Author: mvaldron-renovate[bot]

.github/workflows/deploy.yml

@@ -30,7 +30,7 @@ jobs:
 
       # Deploy site
       - name: Create Deploy Token
-        uses: actions/create-github-app-token@0d564482f06ca65fa9e77e2510873638c82206f2 # v1
+        uses: actions/create-github-app-token@21cfef2b496dd8ef5b904c159339626a10ad380e # v1
         id: create-deploy-token
         with:
           app-id: ${{ secrets.DEPLOY_APP_ID }}