chore: allow lower case in PR subject

[gvauter]

Description

This change updates the commitlint config to not enforce the default rule which only allows lower-case strings in pull request titles. This is required for the current Jira/GitHub integration which requires that Jira issue keys be upper case.

References:

• [Question] how to extend and override config-conventional settings conventional-changelog/commitlint#2232
• https://commitlint.js.org/reference/rules.html#subject-case

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)
• This change requires a documentation update

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 in downstream modules

[huiwangredhat]

That could allow adding the CMPLYT to PR title. Cool. LGTM.

[jpower432]

LGTM