Changes in readme

Author: nv-vankit

README.md

@@ -118,7 +118,7 @@ NanoOWL runs real-time on Jetson Orin Nano.
     cd examples
     python3 owl_predict.py \
         --prompt="[an owl, a glove]" \
-        --threshold="0.1. 0.1" \
+        --threshold=0.1 \
         --image_encoder_engine=../data/owl_image_encoder_patch32.engine
     ```
 
@@ -145,7 +145,7 @@ Then run the example
 ```bash
 python3 owl_predict.py \
     --prompt="[an owl, a glove]" \
-    --threshold="0.1, 0.1" \
+    --threshold=0.1 \
     --image_encoder_engine=../data/owl_image_encoder_patch32.engine
 ```