docs: update README

[joshuajames-smith]

Description

Update README documentation to have consistent badges in line with all-contributors intregration.

Checklist:

Put an x in the boxes that apply to this pull request (you can also fill these out after opening the pull request). If you're unsure about any of these, don't hesitate to leave a comment on this pull request!

• [x] I have read the gliff.ai Contribution Guide.
• [x] I have requested to pull a branch and not from main.
• [x] I have checked all commit message styles match the requested structure.
• [ ] My code follows the style guidelines of this project.
• [ ] I have commented my code, particularly in hard-to-understand areas.
• [x] I have performed a self-review of my own code.
• [ ] I have assigned 3 or less reviewers.
• [x] New and existing unit tests pass locally with my changes.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [x] My changes generate no new warnings.
• [ ] I have made corresponding changes to the documentation.
• [ ] New database changes have been committed.
• [ ] If appropriate, I have bumped any version numbers.

[github-actions[bot]]

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