Docs: add overflow and text color info to progress bar page (!37921) · Merge requests · Bootstrap / bootstrap

Adds information about overflow and text color for labels inside progress bars:

explanation and example of how to use .overflow-visible and an appropriate .text-dark to allow labels to overflow their bar https://deploy-preview-37921--twbs-bootstrap.netlify.app/docs/5.3/components/progress/#labels
explanation and example of explicitly setting .text-dark for labels on progress bars with colored background (to avoid having white labels on light progress bars, which become unreadable) https://deploy-preview-37921--twbs-bootstrap.netlify.app/docs/5.3/components/progress/#backgrounds