[develop] Update SixLabors.ImageSharp & SixLabors.ImageSharp.Drawing which fix vulnerable

Description

This pull request updates the version of the SixLabors.ImageSharp.Drawing package to 2.1.4. This update addresses known vulnerabilities and ensures compatibility with the latest dependencies.

And this branch for preparing to release the hotfix version.

Fixes N/A

Type of change

Please select the relevant option by placing an 'x' inside the brackets, like this: [x].

[X] 🐛 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)
[ ] 🏗️ Internal/structural update (non-breaking change that improves code quality, organization, or performance)
[ ] 📚 This change requires a documentation update
[ ] 🚀 DevOps build chain modification for release
[ ] 🤖 DevOps build chain modification for CI

How Has This Been Tested?

Describe the tests you ran to verify your changes. Provide instructions so others can reproduce the tests. Also, list any relevant details for your test configuration.

Checklist:

Please run through the checklist as much as possible and mark the items completed by placing an 'x' inside the brackets, like this: [x].

[X] My code follows the style guidelines of this project
[X] 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
[X] My changes generate no new warnings
[ ] I have added tests that prove my fix is effective or that my feature works
[X] New and existing unit tests pass locally with my changes
[X] I have successfully run all unit tests on Windows
[X] I have successfully run all unit tests on Linux

iron-software / IronSoftware.System.Drawing