update the secrets note on troubleshooting

Author: tamalchowdhury

src/content/docs/developer-tools/guides/deploy-on-cloudflare-workers.mdx

@@ -225,7 +225,7 @@ Clicking login redirects to `localhost:3000` instead of your Kinde domain. Envir
 **Fix:**
 
 1. Ensure `nodejs_compat_populate_process_env` is in your `compatibility_flags` in `wrangler.toml`
-2. Add all Kinde environment variables to the `[vars]` section of `wrangler.toml`
+2. Add all Kinde environment variables to the `[vars]` section of `wrangler.toml` (except `KINDE_CLIENT_SECRET`, which should be set via `wrangler secret put`)
 3. Update the callback and logout redirect URLs in your Kinde application to match the URL you're accessing the app from
 4. Redeploy your application