fixed disk alert

[parasmgautam18]

Which Issue Does This Fix?

Closes disk alert script

Steps Taken To Fix It

• I added the if else conditions to check if the usage is greater than or equal to threshold.

Testing

Did you test your script locally according to the README.md instructions?

• Yes! The script runs without errors and performs the expected action.

General Checklist

• I have followed the instructions in CONTRIBUTING.md.
• The name of the PR explains what I changed.