ci(root): add DX prefix to commitlint

[ekorenblum-simtlix]

Description

The DX prefix is used by the DevEx team, and commits referencing DevEx tickets would fail if this isn't added

Issue Number

DX-315

Type of change

• Bug fix (non-breaking change which fixes an issue)
• CI change

How Has This Been Tested?

A commit was pushed with the new prefix, and all tests passed

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My code compiles correctly for both Node and Browser environments
• I have commented my code, particularly in hard-to-understand areas
• My commits follow Conventional Commits and I have properly described any BREAKING CHANGES
• The ticket or github issue was included in the commit message as a reference
• I have made corresponding changes to the documentation and on any new/updated functions and/or methods - jsdoc
• 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