Update GitHub Actions workflows. (#2002)

This PR was automatically generated by the
update-workflows-ecosystem-providers workflow in the pulumi/ci-mgmt
repo, from commit d998f97ffac7491c4d6cfd1077a5e878b92bbddf.

Author: pulumi-bot

.github/workflows/export-repo-secrets.yml

@@ -8,7 +8,7 @@ jobs:
     steps:
       - name: Generate a GitHub token
         id: generate-token
-        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2
+        uses: actions/create-github-app-token@29824e69f54612133e76f7eaac726eef6c875baf # v2
         with:
           app-id: 1256780 # Export Secrets GitHub App
           private-key: ${{ secrets.EXPORT_SECRETS_PRIVATE_KEY }}