chore(deps): update actions/create-github-app-token digest to 21cfef2

Author: crossplane-renovate[bot]

.github/workflows/renovate.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Get token
         id: get-github-app-token
-        uses: actions/create-github-app-token@67e27a7eb7db372a1c61a7f9bdab8699e9ee57f7 # v1
+        uses: actions/create-github-app-token@21cfef2b496dd8ef5b904c159339626a10ad380e # v1
         with:
           app-id: ${{ secrets.RENOVATE_GITHUB_APP_ID }}
           private-key: ${{ secrets.RENOVATE_GITHUB_APP_PRIVATE_KEY }}