Fix OTA upload

[polldo]

Motivation

The ota upload command was not working due to a api change on iot-api.
We need to update the iot-client-go and satisfy the new api by adding the new async parameter.

Change description

• update iot-client-go dependency
• fill the new async parameter assigning always true, in order to be consistent with previous behavior

Additional Notes

Reviewer checklist

• PR address a single concern.
• PR title and description are properly filled.
• Changes will be merged in main.
• Changes are covered by tests.
• Logging is meaningful in case of troubleshooting.
• History is clean, commit messages are meaningful (see CONTRIBUTING.md) and are well formatted.

[rsora]

Nice job!