Add missing import for logging module

[JimMadge]

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⤴️ Summary

Imports the logging module to the update Guacamole script

🌂 Related issues

Closes #1680

🔬 Tests

[JimMadge]

@cptanalatriste can you test this branch to see if it fixes #1680?

[cptanalatriste]

@JimMadge is looking good now :)

[craddm]

LGTM