Prepare 4.1.2 release

[Link-]

Description

Release documentation:

• RELEASES.md: Added release notes for version 4.1.2, including a new feature for GitHub Enterprise Cloud instances hostname filters and a security fix for the braces dependency.

Package version update:

• package.json: Updated the version from 4.1.1 to 4.1.2 to reflect the new release.

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• 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 change)
• Documentation (add or update README or docs)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.