Standardize GitHub URL casing in README badges

[Copilot]

Description

Standardized GitHub domain casing from GitHub.com to github.com in badge URLs to eliminate redirects and ensure URL consistency across the README.

Motivation and Context

Addresses feedback from PR #1 where badge URLs on lines 6 and 8 used https://GitHub.com/... while other URLs used lowercase https://github.com/..., creating inconsistency.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• IDE integration
• Performance improvement
• Code refactoring

Changes Made

• Changed GitHub release badge URL from https://GitHub.com/kayaman/safe-rm/releases/ to https://github.com/kayaman/safe-rm/releases/
• Changed GitHub issues badge URL from https://GitHub.com/kayaman/safe-rm/issues/ to https://github.com/kayaman/safe-rm/issues/

Testing

Manual Testing

# Verified no capitalized GitHub.com URLs remain
grep -n "GitHub.com" README.md  # Returns no matches

Automated Testing

• All existing tests pass
• Added new tests for this change
• Tested on Linux
• Tested on macOS (if applicable)

Screenshots (if applicable)

N/A - URL changes only, badges render identically

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published
• I have updated the CHANGELOG.md
• I have tested with oh-my-zsh plugin installation
• I have tested with standalone installation
• IDE integration still works (if applicable)

Additional Notes

This is a stacked PR that merges into PR #1. Changes are minimal (2 lines) to address URL casing consistency feedback.

Related Issues/PRs

• Parent PR: Enhance README with GitHub badges #1
• Triggered by review comment: Enhance README with GitHub badges #1 (comment)

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