Fix: Remove duplicate README files with incorrect casing

[krishna-medapati]

Problem

The repository contains duplicate README files with inconsistent casing (README.md, Readme.md, ReadME.md, readme.md) which causes collision warnings on case-insensitive filesystems like macOS and Windows.

Solution

Removed the incorrectly cased duplicate files, keeping only the standard README.md (all caps) convention.

Files Changed

• ❌ Removed Readme.md from Auto-Populate Short Description
• ❌ Removed Readme.md from validate phone number
• ❌ Removed Readme.md from Convert Incident Records to JSON
• ❌ Removed ReadME.md from CMDB Utility Scripts
• ❌ Removed readme.md from updateMultipleRecords
• ❌ Removed readme.md from Track Discovery Status

✅ All directories now have only one correctly-cased README.md file

Testing

• Cloned repository shows no collision warnings
• All README files remain accessible with standard naming

[krishna-medapati]

This PR fixes filesystem collision warnings on case-insensitive systems (macOS/Windows) by standardizing README filename casing.

• Removes 6 duplicate README files with non-standard casing
• Keeps standard README.md convention across all directories
• Zero functional impact - purely filename standardization
• All checks passing, no conflicts
  cc: @earlduque @naveensnow @nvprav

[github-actions]

👋 Unassigning @wiz0floyd due to inactivity (> 60 min without comments/reviews). This PR remains open for other reviewers.