debug: fix Alpine-incompatible od command in Coolify deploy step

Previous run failed at od -t x1z (unsupported in Alpine busybox).
Switch to hexdump -C which is available in Alpine.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -60,8 +60,7 @@ jobs:
         run: |
           echo "Token length: ${#COOLIFY_TOKEN}"
           echo "Token first 3 chars: $(printf '%.3s' "${COOLIFY_TOKEN}")"
-          echo "Token hex (first 20 bytes):"
-          printf '%s' "${COOLIFY_TOKEN}" | od -A x -t x1z -N 20
+          printf '%s' "${COOLIFY_TOKEN}" | hexdump -C | head -4
           echo "Webhook URL: ${COOLIFY_WEBHOOK}"
           echo "--- Attempt 1: manual Bearer header ---"
           RESPONSE=$(curl -s -w '\n%{http_code}' -X GET "${COOLIFY_WEBHOOK}" \