fix conf read/write opening mode, refs #26945

5.MediaServer/3.Deploy_demokit/0_setup.py

@@ -22,7 +22,7 @@ def setup(interactive=True):
 
     cmds.append('netcapturectl add')
     # hw acceleration requires boot-time module options so a reboot will be needed
-    with open('/etc/miris/netcapture.json.example', 'w') as f:
+    with open('/etc/miris/netcapture.json.example', 'r+') as f:
         c = json.load(f)
         c['enable_hw_acceleration'] = True
         json.dump(c, f)