chore: Update Get-StorAcctInfo.ps1 script for Azure Files Storage dat…

[JCoreMS]

…a collection Incorrect math for storage available percent

Overview/Summary

Fixes the storage calculation script in the runbook which was yielding a much higher remaining value than truly existed. Values were in the 99.xx% range vs actual for remaining meaning the alert may never trigger when remaining storage is truly low.

This PR fixes/adds/changes/removes

1. Script: Get-StorAcctInfo.ps1 line 46
   Was --- $RemainingPercent = 100 - ($shareUsageInGB / $shareQuota)
   New --- $RemainingPercent = 100 - ($shareUsageInGB / $shareQuota * 100)

Breaking Changes

1. N/A

As part of this Pull Request I have

• Read the Contribution Guide and ensured this PR is compliant with the guide
• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues or ADO Work Items (Internal Only)
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Ensured PR tests are passing
• Updated relevant and associated documentation (e.g. Contribution Guide, Docs etc.)