Update start_dlworkbench.sh

Author: ravi9

start_dlworkbench.sh

@@ -6,7 +6,7 @@ docker rm workbench
 
 # Start OpenVINO DL Workbench
 /home/ec2-user/.local/bin/openvino-workbench \
-        --image openvino/workbench:2021.4.1.1 \
+        --image openvino/workbench:2021.4.2 \
         --enable-authentication \
         --assets-directory /home/ec2-user/.workbench \
         >/tmp/ov-workbench.log 2>&1 &