Use --data-binary option instead of -d for octet-stream curls (#1551)

(cherry picked from commit a8be61c)

Author: RobertLucian

docs/deployments/realtime-api/predictors.md

@@ -509,7 +509,7 @@ The `payload` parameter type will be a `bytes` object if a request with a `Conte
 ```bash
 $ curl http://***.amazonaws.com/my-api \
     -X POST -H "Content-Type: application/octet-stream" \
-    -d @file.bin
+    --data-binary @file.bin
 ```
 
 The `payload` parameter type will be a `bytes` object if a request doesn't have the `Content-Type` set: